You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from Denver DEN to Houston HOU. Can you make a reservation for me?

ASSISTANT: Sure, may I know your good name please?

USER: Yes, I am James Clark.

ASSISTANT: May I know your planned travelling dates please?

USER: Ok, my planned trip dates are on July 08 and return on July 10.

ASSISTANT: Is there any specific time for your journey?

USER: Ok, I need a single connecting flight.

ASSISTANT: Sorry Clark, there is no flight found as per your travelling dates.

USER: Ok, not an problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.