You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am looking to book a flight ticket from OAK to JFK. Can you help me for that?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are Dec 23 and Dec 25.

ASSISTANT: Is there any connection limit?

USER: I prefer to book a direct flight in my journey.

ASSISTANT: Which class do you prefer?

USER: Any class is fine for me.

ASSISTANT: May I know your name?

USER: My name is Carolyn Adams.

ASSISTANT: Please hold on for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Carolyn Adams, no direct flight is available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome, have a nice day.