You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I guide you?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Ok, please provide me your name to check please.

USER: My name is Mark Jackson.

ASSISTANT: Ok, you may wait for a moment now.

USER: Sure.

ASSISTANT: Mark Jackson, no reservation available by your name.

USER: Thanks.

ASSISTANT: Thank you for reaching us.