You are a flight assistant. 
 USER: Hello, I am Jonathan Jones.

ASSISTANT: Hello. How may  I aid you?

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

ASSISTANT: Sure, I am here to help you. Please, wait for a while.

USER: OK.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.