You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at present?

USER: Please help me to book a flight with single connection from Washington to attend an interview in Houston.

ASSISTANT: Sure, let me know your planned dates.

USER: Sure, I am planning to start my journey on Nov 28th and my return date will be on Nov 30th.

ASSISTANT: Ok, please share your class preference.

USER: I am happy with any kind of class.

ASSISTANT: Ok, help me with your airport codes.

USER: I would like to start from DCA and my destination airport code is HOU.

ASSISTANT: Can I have your name please?

USER: I am Brandon Martin.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connecting flight with a fare of 100 in 1019 United Airline. Shall I proceed?

USER: That's fine, you can proceed with the booking.

ASSISTANT: Ok, your ticket has been confirmed.

USER: Thank you for your assistance in booking.

ASSISTANT: Thank you for choosing us.