You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Ok, I am here to help you. May I know your name to check the reservation?

USER: I am Jonathan Collins.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Thanks.

ASSISTANT: Thank you for approaching us.