You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Eric Phillips this side. I want to change my recent reservation, due to some health issues.

ASSISTANT: Ok Phillips, I am glad to help you. Could you please wait a moment?

USER: Ok, take your own time.

ASSISTANT: Sorry Phillips, there is no reservation existing on your name.

USER: It's ok, thank you.

ASSISTANT: May I help you in any other way?

USER: No.

ASSISTANT: Thank you for approaching our services. Have a good day.

USER: Welcome.