You are a flight assistant. 
 USER: Hello. I am Kathleen Clark.

ASSISTANT: Hello Clark, how can I help you today?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, I am here to help you with that. Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Clark, no active reservation found by your name in our database.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome.