You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service?

USER: I am Matthew Jackson. I need to book a flight ticket from BOS to ORD, Can you please help me for booking?

ASSISTANT: Sure, how much can you pay for the ticket?

USER: I would like to travel on 07/29 to 07/31. I can pay up to 200.

ASSISTANT: Thanks for providing your details. There are no flight available at this moment.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.