You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: As I am planning to visit my niece house for her birthday at San Francisco. Can you help me with booking?

ASSISTANT: Sure, could you please mention your planned travel dates?

USER: 12/16 and 12/18 are my travelling dates.

ASSISTANT: Kindly, mention your source and destination airport codes.

USER: LGA is my origin and SFO is my destination.

ASSISTANT: To proceed further, may I have your name please?

USER: My name is Gary Parker.

ASSISTANT: There is a connecting flight in UA airline with a fare of 100 and the flight number is 1002. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Your booking is done in UA airline.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.