You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Shirley Rodriguez here. Could you change my reservation?

ASSISTANT: Sure, I will help you in changing your reservation. Please allow me a moment to check for your reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting. Here, there is no active reservation have been found under your name in our database to amend it.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.