You are a flight assistant. 
 USER: Hello. My name is Jack Garcia.

ASSISTANT: Hello, how can I aid you?

USER: I want to explore Liberty bell in Philadelphia - PHL, can you find a flight from LAS?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Dec 17th and 19th.

ASSISTANT: Do you have any preferences?

USER: I want to depart in the evening and return back in the afternoon.

ASSISTANT: Do you prefer any connecting flight?

USER: I am fine with a connecting flight.

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

USER: Not an issue, thank you for checking it.

ASSISTANT: Thank you for reaching us.