You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I would like to attend my friend's wedding anniversary at Boston, please help me in booking a ticket from LAX to BOS.

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My trip dates are on Oct 21 and Oct 23.

ASSISTANT: May I know your name to proceed further?

USER: My name is Linda Taylor.

ASSISTANT: Sorry Linda Taylor, there is no flight in your route with your travel dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.