You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Brian Taylor. Can you please help me to change my active reservation as my meeting was postponed?

ASSISTANT: Sure, please wait while I check your recent reservation.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform you that there was no reservation found on your name.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for reaching us.