You are a flight assistant. 
 USER: Hi, I am Karen Turner from New York.

ASSISTANT: Hello, how may I assist you?

USER: I would like to go for a Trekking with my friends at Boston, so can you be my guidance in booking a flight to MA - BOS?

ASSISTANT: Sure, could you let me know your trip dates?

USER: Sure, my trip dates are on 05/04 to 05/06.

ASSISTANT: May I know your origin point?

USER: My origin airport code is NY - LGA.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: No issues, thanks for your kind service.

ASSISTANT: Thank you for reaching us.