You are a flight assistant. 
 USER: Hi, I am Matthew Johnson.

ASSISTANT: Hello, how can I help you today?

USER: I want to see White House at Washington, can you help me in booking flight ticket with price under 5000?

ASSISTANT: Sure, kindly mention your travel dates?

USER: Ok, I would like to travel on 03/26 and return on 03/28.

ASSISTANT: May I know your airport codes?

USER: Yes, it is a round trip my airport code is DC-IAD.

ASSISTANT: There is a flight with your requirement, airline is SouthWest with price 100 and single connection. Shall I proceed with booking?

USER: Yes, Please proceed with booking.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a good day.