You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Patricia Parker. I am planning to visit Central Park at New York, could you please help me with booking a flight ticket from LAX to LGA?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: I would like to take off on 02/18 and return on 02/20.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: That's ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Anyways, thank you for the information.