You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I would like to visit independence hall at Philadelphia, can you please book me a ticket?

ASSISTANT: Sure, we are glad to serve you. Let me know when you are willing to travel?

USER: My travelling dates are from 05/17 to 05/19.

ASSISTANT: Please share me your airport codes?

USER: My preferable airport codes are from MSP to PHL.

ASSISTANT: May I know your budget for flight ticket?

USER: I can afford 500.

ASSISTANT: Please wait for a moment, let me check the status and revert to you.

USER: Ok.

ASSISTANT: We found a flight with Delta airlines of flight 1029. May I proceed for booking?

USER: Yes, you can.

ASSISTANT: May I have your name please?

USER: My name is Robert Jackson.

ASSISTANT: Your seat has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for availing us.