You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Jerry Wilson.

ASSISTANT: Jerry Wilson, my pleasure to help you today. What can I do for you?

USER: I was made a reservation earlier in this week. But I want to change my reservation. Can you please help me for that?

ASSISTANT: Ok, please wait for a moment till I check with your existing reservation.

USER: Ok, I will wait.

ASSISTANT: Sorry Jerry Wilson, no reservation was found under your name. Sorry for the inconvenience.

USER: Anyway, thank you for the information.

ASSISTANT: Have a great day.