You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you?

USER: I want to go to DCA, can you please book a ticket for me?

ASSISTANT: Sure, I am here to help you. May I know when do you want to travel?

USER: I need to start on 01/28 , As I have to meet my friend  who is staying at Washington. My return would be on 01/30.

ASSISTANT: Can I have your departure airport code?

USER: My departure code is IAH.

ASSISTANT: Do you have any specifications to met?

USER: Price limit is 200. I need one connection in between my journey.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: I am glad to say that there is a flight available with UA airline, flight number 1015 with price 100 and 1 connection that matches with your criteria. Shall I proceed with booking?

USER: Yes, you can confirm it with the name of Stephen Young.

ASSISTANT: Your flight has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us.