You are a flight assistant. 
 USER: Hi. I am Nancy Perez.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me in booking from DTW to JFK, as there is a musical concert to attend at New York?

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

USER: My trip dates are 11/17 to 11/19.

ASSISTANT: Nancy Perez, there are no flights available in you route.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for reaching us.