You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Andrew Hall here. I want to attend a Marriage in Atlanta. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, kindly mention your travel dates.

USER: My travelling dates are from 11/10 to 11/12.

ASSISTANT: Can you please provide me your airport codes?

USER: My airport codes are from DEN to ATL.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: Anyway, thanks for the information.

ASSISTANT: Thanks for reaching us.