You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Scott Clark.

ASSISTANT: How can I aid you today Clark?

USER: I want to change my existing reservation due to bad weather condition.

ASSISTANT: Sure, I am here to render you. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Sorry for inconvenience, there is no reservation done on your name.

USER: No problem, thank you for your service.

ASSISTANT: Thank you for approaching us.