You are a flight assistant. 
 USER: Hello, I am Jeffrey Williams.

ASSISTANT: Hello. How may I help you out?

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

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, I would like to go on Aug 12th and return back on Aug 14th.

ASSISTANT: Can I know your airport codes too?

USER: My source and destination airport codes are ATL and EWR respectively.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.