You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please help me to book a flight ticket from Los Angeles to visit Independence Hall in New York.

ASSISTANT: May I know your travelling dates?

USER: Sure, I want to start my journey on 06/11 and my return date will be on 06/13.

ASSISTANT: May I know your destination airport code?

USER: My boarding and and landing airport codes are LAX and LGA.

ASSISTANT: Can I know your name please?

USER: I am Michelle Taylor.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thank you for reaching us.