You are a flight assistant. 
 USER: Hello. I am Stephen Collins.

ASSISTANT: Hello, How can I serve you?

USER: I heard that Atlanta is a best place for site seeing, Can you please book a ticket on 03/22?

ASSISTANT: Sure, May I know the return date?

USER: I will return back on 03/24.

ASSISTANT: Please help me with your journey codes.

USER: Source code is Boston, BOS and landing point is ATL.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem. Thank you.

ASSISTANT: Thank you for availing us.