You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "cities", "description": "List and search over 75,000 world cities in 20 languages.", "parameters": {"limit": {"description": "Limit results to N results, default is 250.", "type": "int", "default": "250"}, "state_hasc": {"description": "Filter on the state's HASC code. List available at /v1/state.", "type": "str", "default": ""}, "timezone": {"description": "Filter results based on the timezone name. List available at /v1/timezone.", "type": "str", "default": ""}, "geonameid": {"description": "Filter results based on geonameid.", "type": "str", "default": ""}, "prefix": {"description": "Search cities by names starting with the given prefix. The default prefix is 'san fr'.", "type": "str", "default": "san fr"}, "timezone_offset": {"description": "Filter results based on the timezone offset in hours.", "type": "int", "default": ""}, "sort": {"description": "Sort results based on the specified field (e.g., population, state_code, name, timezone, state_hasc, iso_a2).", "type": "str", "default": ""}, "lang": {"description": "Language selection in ISO 639-2 letter code. Overrides Accept-Language header. Defaults to 'en'.", "type": "str", "default": "en"}, "iso_a2": {"description": "Filter results based on the 2-letter country code. Default is 'us'.", "type": "str", "default": "us"}, "name": {"description": "Search for city names that contain the specified name.", "type": "str", "default": ""}, "state_code": {"description": "Filter results based on the state's ISO-3166-2 letter code. Default is 'US-CA'.", "type": "str", "default": "US-CA"}, "fields": {"description": "Select fields to return in the result (e.g., iso_a2, state_code, timezone, timezone_offset, state_hasc, geonameid). Default fields are 'iso_a2,state_code,state_hasc,timezone,timezone_offset'.", "type": "str", "default": "iso_a2,state_code,state_hasc,timezone,timezone_offset"}, "order": {"description": "Specify the sort order, either ascending ('asc') or descending ('desc').", "type": "str", "default": ""}}}, {"name": "measure_distance", "description": "Calculates the distance between two locations specified by their latitude and longitude coordinates. The distance can be measured in various units such as kilometers, miles, feet, or yards.", "parameters": {"lon2": {"description": "Longitude of the second location.", "type": "int", "default": "11.50293"}, "lat2": {"description": "Latitude of the second location.", "type": "int", "default": "3.84803"}, "lat1": {"description": "Latitude of the first location.", "type": "int", "default": "4.05048"}, "lon1": {"description": "Longitude of the first location.", "type": "int", "default": "9.70428"}, "unit": {"description": "Unit of distance measurement. Valid options are 'km' (default), 'mi', 'ft', and 'yd'.", "type": "str, optional", "default": "km"}}}]
I need to find cities in Germany that start with the prefix 'Ber' and are in the Central European Timezone. Also, I am curious about the distance between Berlin and Munich. Can you help me?
user
assistant
[{"name": "cities", "arguments": {"limit": 250, "iso_a2": "DE", "prefix": "Ber", "timezone": "CET", "fields": "name,timezone,iso_a2"}}, {"name": "measure_distance", "arguments": {"lon1": 13.404954, "lat1": 52.520008, "lon2": 11.581981, "lat2": 48.135125, "unit": "km"}}]