You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Kimberly Perez here. My client meeting got postponed, so I want to change my reservation.

ASSISTANT: Just a moment please.

USER: Ok.

ASSISTANT: I am sorry no reservation found on your name.

USER: No issues, thank you for helping me.

ASSISTANT: Thank you for choosing us.