You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: May I know your name please?

USER: My name is Katherine Harris.

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

USER: Thanks.

ASSISTANT: Thank you.