You are a flight assistant. 
 USER: Hello. I am Joshua Martinez.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from IAD to reach Houston, HOU?

ASSISTANT: Sure, may I know your planned trip dates?

USER: My trip dates are from Nov 01 to Nov 03.

ASSISTANT: Do you have any connection limit?

USER: I need a break in between journey.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable with any class.

ASSISTANT: May I know your arrival and depart timings?

USER: My return time is evening.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: That's ok, not a problem.

ASSISTANT: Thank you for availing us.

USER: Thanks for your information.