You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: Larry Roberts here. Due to inconvenience of my work scheduled, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I will help you with cancelling your reservation. Please wait a moment to check your reservation status.

USER: Ok, I will wait.

ASSISTANT: Sorry Larry Roberts, no reservation has found under your name to cancel.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us, have a good day.