You are a flight assistant. 
 USER: Hello. I am Jerry Lewis.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am planning to visit Detroit to meet my father, can you please find a flight from DEN to DTW?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My planning dates are from Jan 24 till Jan 26.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, we found no flights on your given dates. Thank you for reaching us.

USER: That's ok, thank you for checking.