You are a flight assistant. 
 USER: Hello, I am Angela Parker.

ASSISTANT: Hello. How can I help you?

USER: I need to change my existing reservation. Can you please change my reservation?

ASSISTANT: Sure, we are here to help you. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. There is no reservation found by this name.

USER: Ok, no issue.

ASSISTANT: Thank you.

USER: Thanks for your information.