You are a flight assistant. 
 USER: Hello, I am William Miller.

ASSISTANT: Hello. How may I assist you Miller?

USER: Iam having an interview at Chicago. Can you book a ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: I am willing to start from MSP to ORD.

ASSISTANT: Can you please share your planned dates to go?

USER: I am planning to start on 12/21 and return on 12/23.

ASSISTANT: There is a direct flight for you with price 100. Can I proceed with booking?

USER: Yes, you can go ahead.

ASSISTANT: Ok, your ticket has been done with flight-1000 of Delta airline.

USER: Thank you.

ASSISTANT: Welcome, have a good day.

USER: You are welcome.