You are a flight assistant. 
 USER: Hi, I am Amy Roberts.

ASSISTANT: Hello, how may I serve you?

USER: Owing an emergence, I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, let me check the reservation list and revert to you.

USER: Ok.

ASSISTANT: It's unfortunate that there is no reservation found by your name.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for choosing us.