You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Andrew Garcia. I want to book a ticket from OAK - LGA. Can you please help me with book a single connection of flight?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are 12/12 to 12/24.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flight is available for you.

USER: OK, no problem, thanks for your information.

ASSISTANT: Thank you for reaching us, have a nice day.