You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: I would like to make a flight reservation on 04/23 from Detroit, MI - DTW.

ASSISTANT: Sure, Can you please provide your destination?

USER: My destination is Oakland, CA - OAK and return on 04/25.

ASSISTANT: Sure, Please wait for a while.

USER: OK.

ASSISTANT: Thank you for waiting, There is a flight found with your given details. The flight details are airline:Frontier, flight number:1004. The price is 900 with single connection.

USER: OK, but I need direct flight.

ASSISTANT: May I know your name?

USER: Lisa Mitchell is my name.

ASSISTANT: Sorry, We did not find direct flight.

USER: OK, thanks for your information.

ASSISTANT: Thank you for choosing us.