You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me with booking a flight ticket from OAK to JFK?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are from Oct 30 to Nov 01.

ASSISTANT: Do you have any connection limit?

USER: I would be comfortable with single stop over.

ASSISTANT: Is there any other preferences?

USER: My return has to be in evening.

ASSISTANT: May I know your name?

USER: Jeffrey Baker here.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey routes.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.