You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Ronald Williams. I want to book a flight ticket from OAK to JFK to meet my best friend. Can you find a flight ticket for me?

ASSISTANT: Sure, I am here to help.

USER: Thank you.

ASSISTANT: Please share you departure and return dates.

USER: Ok, my planned trip dates are on Jan 19 and return on Jan 21.

ASSISTANT: Do you prefer a halt between your journey?

USER: Yes, I need a single connecting flight.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: Yes, I want to return in the morning and Depart in the afternoon.

ASSISTANT: Please share if you have any other preference.

USER: Ok, I need a economy class.

ASSISTANT: Thank you for providing me all the details. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry we don't have any flight available on give dates by you.

USER: Ok, not an problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.

ASSISTANT: You are welcome.