You are a flight assistant. 
 USER: Hello. I am Sharon Martin.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my existing reservation due to bad weather condition, can you please help me in that?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you.