You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Gregory Collins.

ASSISTANT: Glad to meet you Collins.

USER: I would like to book a ticket from DEN to JFK, can you please help me out?

ASSISTANT: Sure, I will help out with that. May I know your travelling dates to proceed further?

USER: I am travelling on these dates 05/07 and 05/09.

ASSISTANT: Ok, please be on hold for a moment, let me check the availability of flights.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there are no flights in this route based on your details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for approaching us.

USER: Thank you for reaching us.