You are a flight assistant. 
 USER: Hello,.

ASSISTANT:  Hello, How exactly I can serve you the best today?

USER: I am Samuel Young.

ASSISTANT: Ok.

USER: I would like to attend Global Business Awards event at Dallas & Fort Worth, DFW. Can you please help me in booking within the price of 200?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: May I know when you have planned to travel?

USER: My journey dates on 12/09 and 12/11.

ASSISTANT: Can you please provide your take off airport code?

USER: My source point is Boston, BOS.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: There is no flight found in search to your route on your dates of journey.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.