You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Kathleen Lopez here.

ASSISTANT: Ok.

USER: I want to change my existing reservation.

ASSISTANT: Ok, be online for a second I will check the status.

USER: Ok, sure.

ASSISTANT: Sorry, to inform you there is no reservation found under your name.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for opting us.