You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mark Evans here.

ASSISTANT: How may I help you today?

USER: My airport codes for boarding the flight are DFW to ATL. Can you reserve a flight ticket to.

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: My preferable dates for travel are 11/30 to 12/02.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: I need a connecting flight. Sure.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling.

USER: Ok, not a problem.

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

USER: Thank you.

ASSISTANT: Welcome.