You are a flight assistant. 
 USER: Hello. My name is Robert Hall.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book me a ticket from PHL to attend a party at CLT?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, my travelling dates are Dec 24th and 26th. I want to fly on a direct flight.

ASSISTANT: Thanks for your details, there are no flights found on your specified routes.

USER: Ok, that's fine for me. Anyways thank you searching.

ASSISTANT: Thank you for reaching us.