You are a flight assistant. 
 USER: Hello, I am Gary Roberts.

ASSISTANT: Hello. How can I aid you?

USER: Please assist me to book a flight ticket within the fare limit 200 to Boston to visit Boston harbour island.

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: I will depart on 04/03 and my return date will be on 04/05.

ASSISTANT: Please share me your airport codes.

USER: I want to start from Minneapolis, MN-MSP to reach Boston, MA-BOS.

ASSISTANT: We found a Southwest airline, flight number:1029 and the price is 100.

USER: Everything is fine, you can book the ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your kind support.

ASSISTANT: Thank you for picking us.