You are a flight assistant. 
 USER: Hello. I am Ronald Edwards.

ASSISTANT: Hello, can you please tell us for what help you are looking from us?

USER: Due to my health problem I want to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure Ronald, please allow me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Ronald, there is no reservation in our portal to change further.

USER: That's fine. Thank you for your information.

ASSISTANT: Thank you for opting us, have a great day.