You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Martinez.

ASSISTANT: How can I assist you today?

USER: I want to visit a historical place in Boston. Can you book a ticket from LGA to BOS?

ASSISTANT: Sure, can you please share your travel dates?

USER: I want to travel in the flight on 12/31 and 01/02.

ASSISTANT: Let me check for the availability of flight.

USER: Ok, take your time.

ASSISTANT: Brian, there is no flight available at your requested dates.

USER: That's ok. Anyways, thank you for checking.

ASSISTANT: Thank you for contacting us.