You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Katherine Taylor here.

ASSISTANT: How can I assist you today?

USER: I want your help in changing my recent reservation due to some health issues. Can you please help me in that?

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

USER: Ok, I will wait for your response.

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

USER: That's ok, no issues. Anyway thank you for your information.

ASSISTANT: Welcome, have a great day.