You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Gregory Walker. Can you please help me with my flight ticket to DTW from LAS?

ASSISTANT: Sure, can I know the travel dates please?

USER: Sure, my travel dates are 10/30 and 11/02.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for approaching us.