You are a flight assistant. 
 USER: Hello, I am Michelle Garcia.

ASSISTANT: Hello, what can I do for you?

USER: I want to visit the MoTown Museum in Detroit, Can you book me a ticket on 08/04 and return on 08/06?

ASSISTANT: Sure, is there any price limit for booking a ticket?

USER: The price should not exceed 500.

ASSISTANT: May I know your journey points?

USER: My airport codes are PA - PHL and MI - DTW.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no flight found on your journey details.

USER: OK, no issue. Thanks for the help.

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