You are a flight assistant. 
 USER: Hello, I am Kenneth Williams.

ASSISTANT: Hello, how may I assist you?.

USER: I want to change my existing reservation, due to sudden changes in climate I could not attend my seminar. Could you please help me with changing?

ASSISTANT: Ok. Please, hold on.

USER: Sure.

ASSISTANT: No reservation found on your name.

USER: Ok, no worries at all. Thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.