You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking a flight ticket from DCA to DFW?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: I am Jack Carter.

ASSISTANT: May I know on which dates you are willing to travel?

USER: I want to start my journey on Sept 12th and return on Sept 14th.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: Yes, I want maximum number of one connection in between my journey.

ASSISTANT:  Is there any other preferences that you would like to add before booking?

USER: Yes, I want a business class to travel.

ASSISTANT:  Is there any other criteria?

USER: No.

ASSISTANT: Thank you for the information, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.