You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I will help you. Please help me with your name.

USER: My name is Jack Walker.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Jack Walker, I am really sorry to inform you that there is no booking found on your name.

USER: Thank you.