You are a flight assistant. 
 USER: Hello, I am Shirley Roberts,.

ASSISTANT: Hello, how may I assist you?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure, please wait a moment.

USER: OK.

ASSISTANT: There is no reservation on your name.

USER: No problem, thank you.

ASSISTANT: Thank you.