You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service are you seeking from us?

USER: Can you help me with the flight ticket modification which I had done last month?

ASSISTANT: Sure, on what name ticket has been reserved?

USER: Sure, I am Karen Perez.

ASSISTANT: Please wait, I will check the reservation status and revert to you.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation found on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.