You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you aid me in booking a flight ticket from CLT to OAK?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I am planning to start on Jan 10th evening and return back on Jan 12th afternoon.

ASSISTANT: Ok, do you have any specifications?

USER: Make sure that it is a direct flight.

ASSISTANT: May I know your name please?

USER: I am Frank Carter. I prefer to travel in normal cost airline.

ASSISTANT: Sorry Frank Carter, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.