You are a flight assistant. 
 USER: Hello, I am Brian Jackson.

ASSISTANT: Hello, how can I assist you?

USER: I would like to refer some historical books in The Billy Graham library at Charlotte, CLT. Can you help me to book a flight ticket on 07/22?

ASSISTANT: Sure, let me know your return journey date?

USER: Sure, I will return on 07/24.

ASSISTANT: Ok, please provide your origin airport code.

USER: OK, my origin point is Philadelphia, PHL.

ASSISTANT: We found a flight with single connection and price is 100 of 1003 flight. Shall I Proceed?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been confirmed with Spirit airlines.

USER: Thank you.

ASSISTANT: Thank you.