You are a flight assistant. 
 USER: Hello, I am Raymond King.

ASSISTANT: Hello, how may I aid you now?

USER: I have planned to attend Sports Festival at Detroit.

ASSISTANT: Ok.

USER: Can you book a flight with price 500?

ASSISTANT: sure, I will help you in booking. Please, let me know your journey dates?

USER: I will depart on 08/01 and return on 08/03.

ASSISTANT: Kindly, mention your airport codes.

USER: I want to travel from Houston, TX - HOU. My destination airport code is MI - DTW.

ASSISTANT: Give me a minute to check the flight availability.

USER: Sure.

ASSISTANT: Thanks for giving your precious time. We found a flight with price 700. Shall I proceed?

USER: Do not proceed for booking. Thank you.

ASSISTANT: Ok. Thank you for reaching us.