You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to some health issue, I want to cancel my recent reservation.

ASSISTANT: Sure, I am here to help you out. May I know your name please?

USER: Sure, I am Margaret Nelson.

ASSISTANT: Wait a moment please.

USER: Ok, I will wait.

ASSISTANT: Margaret Nelson, we haven't found any reservation under your name in our database.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for reaching us.