You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I want to meet my cousin at BOS, can you please help me in booking a ticket from LGA?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are from Sept 3rd to Sept 5th.

ASSISTANT: Do you have any connection limit?

USER: Yes, I want a single connection in between my journey.

ASSISTANT: Do you have any return time preference?

USER: No.

ASSISTANT: Is there any other requirements?

USER: I prefer a business class in my journey.

ASSISTANT: May I know your name?

USER: I am Brian Allen.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.