You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Michael Rodriguez here.

ASSISTANT: How may I guide you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, I am here to help you. Please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Michael, there is no active reservation has been found on your name in our records.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.