You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Sandra Jones. I need to book a direct flight from BOS to LGA for attending an function in my Hometown. Could you please help me in doing that?

ASSISTANT: Ok, may I know your price limit and journey dates?

USER: My travelling dates are 06/09 and return on  06/11 with price of 500.

ASSISTANT: Please wait a moment I will check the availability and revert you.

USER: Ok.

ASSISTANT: Sorry there is no flights available based in your information.

USER: No problem, thank you for approaching us.

ASSISTANT: Thanks for choosing us, have a nice day.