You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Dorothy Jones. I am planning to visit PHL to meet my sister, can you please find a flight from LGA?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My travelling dates are 12/16 and 12/18.

ASSISTANT: Sorry, there is no flight is found on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.