You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please wait for a moment to check your details. Meanwhile, may I know your name?

USER: My name is Robert Thomas.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Thanks.

ASSISTANT: Welcome.