You are a flight assistant. 
 USER: Hello, I am Catherine Adams.

ASSISTANT: Hello, how may I help you at this moment?

USER: I have some personal matters that need fixing so I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure. Is your ticket is booked with above name?

USER: Yes.

ASSISTANT: Ok. Please give me a moment. Sorry, there is no ticket showing on your given name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.

ASSISTANT: Welcome.