You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: My name is Linda Clark. I want to book a flight ticket  on 05/20. Can you help with booking?

ASSISTANT: Sure, may I know your airport codes and price limit.

USER: The price limit is 500. Airport codes are from ORD to DTW.

ASSISTANT: May I know your return date?

USER: I will be recur on 05/22. Make sure that the connection should be 1.

ASSISTANT: We are sorry to notify you that there is no flights available based in your given details.

USER: Ok, No problem. Thanks for your information.

ASSISTANT: Thanks for choosing us, have a nice day.