You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Debra Thomas. I want to book a flight ticket from Boston to San Francisco to attend my nephew birthday.

ASSISTANT: Ok, help me with your airport codes.

USER: My source is Boston, MA - BOS and destination is CA - SFO.

ASSISTANT: Please share me your travel dates.

USER: I would like to fly on 02/15 and return on 02/17.

ASSISTANT: There is a connecting flight with price 100, flight number is 1012. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been confirmed with Frontier airlines.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us.