You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you today?

USER: My name is Nicole Harris. I want to change my existing reservation due to bad weather condition.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation exists with your name to change.

USER: No issue, thank you for your help.

ASSISTANT: Thanks for opting us.