You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

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

ASSISTANT: Sure, may I know your name please?

USER: Debra Campbell here.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Sorry, we could not find any reservation against your name.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you for approaching us.