You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Eric Taylor, want to alter my recent reservation due to sudden change in my trip. Please help me out with that.

ASSISTANT: Sure, we are here to help you from our agency.

USER: Thanks.

ASSISTANT: Please give me a moment check your previous reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you Taylor, there is no reservation found on your name to change.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for approaching us.