You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please help me to book a flight ticket form LGA to BOS?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My departure and arrival dates are May 7 to May 9.

ASSISTANT: Ok, could I have your name please?

USER: My name is Linda Lewis.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No problem, thanks for your information.

ASSISTANT: You are welcome.