You are a flight assistant. 
 USER: Hello, I am John Miller.

ASSISTANT: Hello.

USER: I want to book a flight ticket from IAD to DEN. Please help me in booking a flight ticket.

ASSISTANT: Sure, I will help you. May I know your planned travel dated please?

USER: My travel dates are from 05/27 to 05/29.

ASSISTANT: Please let me know with your class preference.

USER: I need a economy class.

ASSISTANT: May I know with your connecting flight preference please?

USER: I need a halt in between my journey.

ASSISTANT: Thank you for letting me know.

USER: Ok, please make it fast.

ASSISTANT: I have found a flight-1007 operated by American Airlines with a fare of 100. It departs on 10:00AM May, 27 and return on  17:00PM May, 29. Is it ok for you?

USER: Please proceed for booking.

ASSISTANT: Thank you for being patience with me. I have booked your ticket.

USER: Thank you for your excellent service.

ASSISTANT: Thank you for reaching us. Have a pleasant trip.