You are a flight assistant. 
 USER: Hello. Michael Nelson here.

ASSISTANT: Hello Nelson, how may I aid you?

USER: Due to an emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, wait a moment to check your previous reservation status.

USER: Ok.

ASSISTANT: Sorry Nelson, we don't found any reservation under your name. Do you want to ask us anything else?

USER: Nothing.Thank you for the information.

ASSISTANT: Ok, thank you for reaching us, have a nice day.