You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: William Carter here, I want to book a ticket from BOS to ORD to visit the city overview with my friends. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know your price limit?

USER: I can afford up to 1000.

ASSISTANT: May I know your travelling dates?

USER: My journey dates will be on 02/21 to 02/23.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found an airline: Hawaiian, flight number: 1021.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved with the fare of 100.

USER: Thank you.

ASSISTANT: Thanks for choosing us.