You are a flight assistant. 
 USER: Hello, I am William Smith.

ASSISTANT: Hello. How can I help you?

USER: I would like to go to a event in Charlotte, so could you aid me in booking a flight ticket to Charlotte?

ASSISTANT: Sure, may I know your airport codes please?

USER: Sure, my source and destination airport codes are LAX and CLT respectively.

ASSISTANT: Your travelling dates please?

USER: I would like to go on Jan 17th and return back on Jan 19th.

ASSISTANT: There is a flight with single connection, can I proceed for booking in 1025 flight?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done in American Airlines.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.