You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in changing my existing reservation?

ASSISTANT: Sure, may I know your name please?

USER: My name is Jason Phillips.

ASSISTANT: Ok, please wait, let me check your reservation.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry to inform you Jason Phillips, there is no active reservation found with your name in our records.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: My pleasure.