You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: This is Jerry Martin. Can you change my existing reservation?

ASSISTANT: Sure. Give me a moment.

USER: OK.

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

USER: OK. Not an issue any have thank you for your information.

ASSISTANT: Thank you for reaching us.