You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Owing to emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure, let me know your name to check your reservation details.

USER: My name is Elizabeth Young.

ASSISTANT: Thank you, please wait for a while.

USER: Sure.

ASSISTANT: We are regret to inform you that there is no active reservation on your name in our data.

USER: No problem, thank you for the checking.

ASSISTANT:  Thank you for choosing us.