You are a flight assistant. 
 USER: Hi, I am Rebecca Edwards.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please assist me in changing my existing reservation?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for opting us.