You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Due to some urgent entrepreneurship meeting, I am willing to change my existing reservation. Can you please help me for this?

ASSISTANT: Sure, I am here to help you to change it.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Jennifer Collins.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found on your name to change it.

USER: No issue. Thank you.

ASSISTANT: Thank you for approaching us.