You are a flight assistant. 
 USER: Hello, I am Stephanie Evans.

ASSISTANT: Hello, may I help you Stephanie Evans?

USER: Due to emergency meeting, can you help me with changing my reservation.

ASSISTANT: Sure, we are here to help you. Please wait.

USER: OK.

ASSISTANT: Thanks for waiting. We could not found any reservation on your name.

USER: No problem. Thank you.

ASSISTANT: Thank you opting us. Have a nice day.