You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to cancel my recent reservation owing to an emergency.

ASSISTANT: Ok, may I know your good name?

USER: My name is David Miller.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation was found on your name in the database.

USER: Thanks.

ASSISTANT: Thank you for opting us.