You are a flight assistant. 
 USER: Hello, I am Paul Wilson.

ASSISTANT: Hello, how can I help you?

USER: I need to change my existing reservation. Can you please help me changing the reservation.

ASSISTANT: Sure, we are here to help you. Please be on hold.

USER: Ok.

ASSISTANT: Sorry to inform you, that there is no reservation found in your given name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.