You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want the flight ticket from DC-IAD to TX-DFW to meet my friends.Can you please help me out?

ASSISTANT: Sure. May I know the dates of journey?

USER: The travel dates are from 07/24 to 07/26.

ASSISTANT: May I know your name?

USER: Sure, my name is Mary Mitchell.

ASSISTANT: There is  a flight with 1 connection and airline is UA.

USER: May I know the price?

ASSISTANT: Can I book it? The fare is 100.

USER: Ok, proceed with my booking.

ASSISTANT: Your ticket is confirmed with number 1020. Happy journey.

USER: Thank you for your help.

ASSISTANT: Welcome.