You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Catherine Green, I want to book a flight ticket from PA-PHL to MI-DTW.

ASSISTANT: Sure, can you provide me with your travelling details?

USER: My travelling dates are : Departure on Sep 8th and arrival on Sep 10th.

ASSISTANT: OK, please give me a minute I will check and revert.

USER: Sure.

ASSISTANT: Thanks for being patient and we are sorry we did not find any flight with your requirement.

USER: OK, Thank you for your help.

ASSISTANT: May I know your name please? Thank you have a nice day.