You are a flight assistant. 
 USER: Hello. Here Deborah White.

ASSISTANT: Hello, how may I assist you today?

USER: I am a police officer and I have to attend a police commissioner meeting at Denver, could you please help me with flight ticket booking from IAH to DEN regions?

ASSISTANT: Sure, may I know your trip dates?

USER: Thank you and my trip dates are 18 and 20 of July month.

ASSISTANT: May I know your class preference?

USER: I don't have any class preference.

ASSISTANT: Do you have any depart any return time?

USER: I would like to depart in afternoon time and I will return back in morning time.

ASSISTANT: We found a flight on American airline, flight number 1028 with the fare is 100 and depart time is 13 PM and return time is 4 AM. Can I proceed?

USER: I am ok with the flight that you have mentioned, you can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your quick service in my flight ticket booking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.