You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Myself Jessica Mitchell.

ASSISTANT: Welcome to flight booking agency Jessica.

USER: Can you please book a flight ticket booking from DEN to ATL?

ASSISTANT: Sure, I am gleeful to help you. May I know your preferable dates that you want to travel?

USER: Sure, I need to travel on dates of 11/27 and 11/29.

ASSISTANT: Please wait a moment to check the best flights available in your route.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your requested dates of travelling.

USER: Oh! It is sad to hear.

ASSISTANT: Thank you for approaching us, hope you have a great day.

USER: Anyway, thank you for your time.

ASSISTANT: Welcome.