You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to book a normal cost flight ticket?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travel dates are Feb 26 and Feb 28.

ASSISTANT: May I know your name to proceed further?

USER: I am Mary Nelson.

ASSISTANT: Can you mention me your nearest airport codes?

USER: My airport codes are JFK and OAK.

ASSISTANT: Mary Nelson, here is a connecting flight in economy class with AA airlines. Can I proceed with it?

USER: Please ensue that I would like to prefer return back in the evening time, in the direct flight.

ASSISTANT: Sorry Mary Nelson, there is no flight as per your mentioned travel dates with your required intent.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us  Mary Nelson.