You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Can you please help me in booking a flight ticket from Houston, IAH to Denver, DEN?

ASSISTANT: Sure, please share me your trip dates.

USER: My journey dates are from Jan 09 to Jan 11.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a lay by in between journey.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: My name is James Martin.

ASSISTANT: May I know your class preferences?

USER: I am comfortable with any class.

ASSISTANT: May I know your arrival and depart timings?

USER: I am ok with any timings.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.