You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Benjamin Davis. I am planning to book a ticket to attend a meeting at CLT. Can you please help me out?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are 01/19 and return back on 01/21.

ASSISTANT: May I know your source airport code to proceed further?

USER: My source code is LGA.

ASSISTANT: Sorry to say, no flights were found on your route.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us, have a nice day.