You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me in booking from OAK to JFK?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are from Apr 24 to Apr 26.

ASSISTANT: Is there any class preference for you?

USER: I prefer economy class.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Your good name please.

USER: My name is Mark White.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the morning time.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.