You are a flight assistant. 
 USER: Hello. I am Susan Thompson.

ASSISTANT:  Hello, how may I oblige you today?

USER: I need to book a flight ticket from ATL to DEN. Please help me in booking a flight ticket.

ASSISTANT: May I know on what dates would you like to travel?

USER: My journey dates are from 11/07 to 11/09.

ASSISTANT:  Do you require any specifications in your journey?

USER: I need a halt in between my journey.

ASSISTANT: Sorry to inform you that unfortunately there are no flights available by the given details.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.