You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am William Harris. I want to book a flight ticket on 11/16 and return on 11/18, so can you help me with booking?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your source airport code?

USER: It is a round trip my airport code is CA-OAK.

ASSISTANT: Kindly, mention your destination airport code.

USER: I mentioned it is a round trip.

ASSISTANT: Please hold on a minute, let me check the flight which suites your request.

USER: Ok.

ASSISTANT: You have a flight with airline Spirit and flight number is 1028 with a halt and price is 100.

USER: Please proceed with booking.

ASSISTANT: Your reservation is done.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe journey.