You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I am Anthony Allen, I want to book a flight ticket to Dallas & Fort Worth, TX - DFW . Can you help me for booking from Denver, CO - DEN?

ASSISTANT: Sure, can you please mention your depart and arrival dates?

USER: I have a plan to travel on 02/15 to 02/17.

ASSISTANT: Do you have any specifications?

USER: I need a halt in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We did not found any flights from your source.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.