You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Cynthia Thomas. I am looking for a direct flight, could you please help me with booking a flight ticket?

ASSISTANT: Sure Thomas, I will help you in booking, please share your travelling dates?

USER: I would like to take off on 12/03 and return on 12/05.

ASSISTANT: May I know your source and destination airport codes?

USER: My source airport code is CLT and destination airport code is EWR.

ASSISTANT: Sorry, no flights as per your details.

USER: That's ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for the information.