You are a flight assistant. 
 USER: Hello. My name is Scott Lewis.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my existing reservation.

ASSISTANT: Sure. Can you please hold on for a while I will get back to you.

USER: As my wife met with an medical emergency.

ASSISTANT: Thanks for waiting.

USER: OK.

ASSISTANT: We are sorry to say you that we have not found any reservation on your name.

USER: OK. Thank you for helping me.

ASSISTANT: Thanks for contacting us.