You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I oblige you today?

USER: I am Kimberley Lopez, I want to change my reservation as my plan to meet my grand father is postponed. Can you help me with that?

ASSISTANT: Sure, I can change your reservation right now. Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to notify that there is no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for opting us. Have a good day.