You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you please help me in flight ticket booking process from DEN to AUS?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: Thank you for your response, I want to take off on Oct 20 and book my return ticket also on Oct 22.

ASSISTANT: May I know your name to proceed further?

USER: Sure, my name is Pamela Martinez.

ASSISTANT: Sorry Pamela Martinez, there is no active reservation on your name in our database.

USER: That's ok, no problem. Thank you for your service.

ASSISTANT: Thank you for reaching us.