You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Scott Clark. I want to change my existing reservation, due to some health issue. Can you please help me?

ASSISTANT: Please wait a moment I will revert you back with the proper information.

USER: Ok, take your time.

ASSISTANT: Thanks for your time, there is no reservation found under the name you have given.

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

ASSISTANT: Welcome Scott Clark.