You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you now?

USER: Can you please book a flight from IAD to IAH for my journey please?

ASSISTANT: Sure, we are glad to help you. May I know your trip dates?

USER: My journey dates are from Jan 3 to Jan 5.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I need a direct flight for my journey.

ASSISTANT: Is there any other specifications for you?

USER: I was looking for a big brand airlines for my journey.

ASSISTANT: Can I have your good name?

USER: Myself Virginia Green.

ASSISTANT: United Airlines is providing direct flight with the ticket fare of 100 and depart time is 17:00 hours, arrival time is 8:00 hours, Shall I proceed?

USER: Ok, please proceed with booking my reservation now.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1003.

USER: Thank you for helping me with my requirement.

ASSISTANT: Thank you for opting us.

USER: Most welcome.