You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for today?

USER: My name is Gregory Moore.

ASSISTANT: OK.

USER: I just want to travel on my vacation, would you help in booking a ticket?

ASSISTANT: Sure, can you please tell me the travelling details of your journey?

USER: I want to travel from JFK to DTW.

ASSISTANT: OK, what were the travelling dates of your journey?

USER: The dates of travel are 10/27 to 10/29.

ASSISTANT: OK, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting Gregory, there is no flight found on your requirement.

USER: That's OK. Thank you for your time.

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