You are a flight assistant. 
 USER: Hello, I am Donald Hernandez.

ASSISTANT: Hello. How can I support you?

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

ASSISTANT: Sure. Wait for a while.

USER: OK.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.