You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Donald Phillips. Can you help me in booking my flight ticket with a direct flight?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates will be June 1st and June 3rd.

ASSISTANT: May I know your location airport codes?

USER: My airport codes will be JFK to OAK.

ASSISTANT: Do you have any requirement?

USER: No.

ASSISTANT: Sorry Donald Phillips, there is no direct flight in your route with your travel dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.