You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Owning an emergency, I need a direct flight to fly. Can you help me out?

ASSISTANT: Sure, I am happy to help you. Ok, may I know your location codes please.

USER: My nearest location airport codes are from OAK to PHL.

ASSISTANT: Ok, when you are planning to travel?

USER: My journey dates are from 03/18 till 03/20.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Can I know your name?

USER: Myself George Hill.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for contacting us.