You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Health camp is conducting in New York, NY - LGA on 03/25. So I need to attend for that.Can you please book a flight ticket?

ASSISTANT: Sure. Can you please provide your source details?

USER: My source point is Philadelphia, PA - PHL and I need to return on 03/27.

ASSISTANT: Sorry, no flights available as per your planned dates. May I know your name?

USER: Ok, no problem. Elizabeth Parker is my name.

ASSISTANT: Ok. Thank you for choosing us.

USER: Thanks for your information.