You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Scott Mitchell. Can you please book a direct flight for me to attend a meeting in Denver, DEN.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please help me with your travelling dates?

USER: My journey start on 10/31 and need to catch return flight on 11/02.

ASSISTANT: May I know your price limit?

USER: I can spend up to 500 for airfare.

ASSISTANT: Ok, will you please intimate your source code?

USER: My source point is Charlotte, CLT.

ASSISTANT: Ok, please wait for a while Scott Mitchell.

USER: Sure.

ASSISTANT: We have a connecting flight with best price in Delta airline of 100. Shall I proceed with booking?

USER: I need a direct flight. can you check once.

ASSISTANT: Sorry, we could not find any direct flights on your requested travel dates.

USER: If direct flight is not available proceed with connecting flight.

ASSISTANT: Sure, your booking has been confirmed on name of Scott Mitchell in 1008 Delta airline.

USER: Thank you for booking my ticket.

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