You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Good Morning.

USER: My name is Patrick Young.

ASSISTANT: How can I be a help for you?

USER: I want to travel from PHL to SFO.

ASSISTANT: Ok Patrick, please tell me your preferable dates?

USER: My dates are from 11/03 to 11/05.

ASSISTANT: Ok, please wait for a while.

USER: I want direct flight.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: That's ok. Thank you.

ASSISTANT: Thank you, have a nice day.