You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Gregory Thomas. I want to travel from SEA to MSP. Can you help me to book a flight ticket?

ASSISTANT: Sure, can I know your preferable dates?

USER: I want to fly in the flight on 05/13 and 05/15.

ASSISTANT: I found a flight 1003 of Spirit airlines matches with your preferences, can I proceed?

USER: Proceed to booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you, have a good day.