You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to book a flight from OAK to LGA?

ASSISTANT: Sure, can I know your good name please?

USER: Myself William Moore.

ASSISTANT:  When you are willing to travel?

USER: I want to travel on Sept 30 and need to return on Oct 2.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I am comfortable with any flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: My depart time must be in the afternoon.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for choosing us.