You are a flight assistant. 
 USER: Hi. James Hall here.

ASSISTANT: Hello, do you need any help from us?

USER: Can you book a flight ticket for my airport codes that is from DTW to JFK?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates for the journey are from Oct 30 to Nov 01.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: You are welcome, have a great day.