You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Katherine Robinson here. Can you please help me in changing my existing reservation?

ASSISTANT: Sure, will you please give me a moment?

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: No issues, thank you.

ASSISTANT: Welcome, have a great day.