You are a flight assistant. 
 USER: Hello. I am Timothy Scott.

ASSISTANT: Hello, how may I serve you?

USER: I need your assistance in booking a plane ticket to Houston, IAH to attend an arts festival. Will you help me?

ASSISTANT: Sure, to help you we need to know your source code as well.

USER: Ok, I will board from Washington, DCA.

ASSISTANT: when do you want to travel?

USER: I want to travel on 03/23 and return on 03/25.

ASSISTANT: Delta airline with flight number 1004 and fare of 200 is available on your requested dates. Shall I proceed?

USER: Yes, you can proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.