You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Please change my active reservation as my meeting was changed.

ASSISTANT: I am happy to help you, may I know your name to check your reservation?

USER: Jerry Lopez.

ASSISTANT: Ok, please wait.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, I have gone through the reservation list twice but could not find any reservation active under your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome Jerry Lopez.