You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I'm Jerry Evans. I want to change my existing reversation.

ASSISTANT: Jerry, Let me check.

USER: Can you please help me?

ASSISTANT: Sorry there is no reservation found under your name.

USER: It's ok.

ASSISTANT: Thank you for reaching us.Have a nice day.

USER: Thank you for your information.