You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for this moment?

USER: Ashley Walker here. Can you make my reservation from JFK to DTW?

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My travelling dates are from 06/17 to 06/19.

ASSISTANT: Sorry Walker, there is no flight found as per your travelling details.

USER: It's ok. Thank you.

ASSISTANT: You are welcome and have a great day.