You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, can I know on whose name the reservation is done?

USER: Sure, I am Dorothy Thomas.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for your time, there is no active recent reservation found on the given name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you.