You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,how can I aid you?

USER: Owing to an emergency I had to request for this cancel reservation.

ASSISTANT: Sure, I am here to help you. May I know your name to check with existing reservation?

USER: My name is Stephanie Turner.

ASSISTANT: I am sorry to say you that there is no reservation found under your name in our database.

USER: Thanks.

ASSISTANT: Thank you for choosing us.