You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight from JFK to attend meeting with share holders. Can you help me to book a flight to OAK?

ASSISTANT: Your travelling dates please?

USER: I will fly on Dec 09 and return on Dec 11.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Is there any specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Jason Thomas.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.