You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please book me a flight ticket which returns in the evening?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: My source and destination airport codes are SFO and PHX.

ASSISTANT: Can you please share your planned travel dates?

USER: My planned travel dates are from May 22nd to May 24th.

ASSISTANT: Do you want connecting flight?

USER: Yes.

ASSISTANT: Do you have any other requirements?

USER: I prefer an economy class.

ASSISTANT: May I know your name please?

USER: I am Rebecca Moore.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found an UA airline, flight number: 1025, price: 100 with one connection.

USER: Please proceed.

ASSISTANT: Your flight ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.