You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Benjamin Smith.

ASSISTANT: How can I help you?

USER: Will you help me in booking he flight ticket from OAK to MCO?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My travelling dates are Dec 27 and Dec 29.

ASSISTANT: Do you have any specifications?

USER: I need a flight with single connection which departs and return in evening time.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, not an issue. Thank you for your information.

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