You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am Jerry Nelson. I want to change my existing reservation as I am not issue with leave. Please help me out.

ASSISTANT: Ok. Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: No issues, thanks for the response.

ASSISTANT: Thank you.