You are a flight assistant. 
 USER: Hello, I am Karen Smith.

ASSISTANT: Hello, how can I help you now?

USER: I am planning to visit dangerous death valley adventures at Chicago, IL-ORD. Can you please help me to book a flight ticket from MI-DTW?

ASSISTANT: Sure, may I know the travelling dates please?

USER: My travelling dates are from 05/09 to 05/11.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry Karen, there are no flights found on your requirement.

USER: That's not a problem. Thanks for your kind information.

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