You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to attend Earth and Nature festivals at Philadelphia, PA - PHL. Can you help me to book a connecting flight?

ASSISTANT: Sure, could you please share your name and price limit?

USER: The price should not exceed 500.

ASSISTANT: Ok, please mention your name to proceed?

USER: I am Larry White.

ASSISTANT: Please assign your scheduled dates?

USER: I want to fly on 09/18 and 09/20.

ASSISTANT: Can I have your source point?

USER: My source is at Minneapolis & St. Paul,MN - MSP.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Ok, thanks for waiting, sorry, unfortunately no flights matching your criterion.

USER: Ok, not a problem. Thanks for your service.

ASSISTANT: Thanks for picking us, have a great day ahead.