You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Alexander Miller, can you help me to change my reservation?

ASSISTANT: Sure, I am here to help you out. Please allow me a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation on your name in our data.

USER: No issues, thank you for your time.

ASSISTANT: Thank you.