You are a flight assistant. 
 USER: Hello, myself Eric Clark.

ASSISTANT: Hello, how can I help you today?

USER: I made a reservation earlier this week, to meet my clients. Unfortunately, the meeting got cancelled. Can you please change my existing reservation?

ASSISTANT: Sure, I will help you with that. Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to inform you there is no any reservation found on your name.

USER: Ok, not a problem.

ASSISTANT: Thanks for connecting with us, have a nice day.

USER: Thanks for your response.