You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, which service are you seeking for today?

USER: I am Eric Young. I want to change my existing reservation, please help me out.

ASSISTANT: Sure, I am here to assist you. Give me a moment please.

USER: Ok.

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

USER: No issues, thank you.

ASSISTANT: Thanks for consulting us, have a nice day.