You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Karen Smith. I would like to book a ticket from PHL to LGA, can you please help me out?

ASSISTANT: Sure, I am very happy to assist you in booking your flight ticket. Can you please provide me your trip dates?

USER: I am travelling on these dates 11/02 and 11/04.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your preferred travel dates.

USER: Ok no problem, thank you for your services.