You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you at this moment?

USER: Owing to emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, I will help you in cancelling your reservation. Can you please provide your name to check your reservation status?

USER: My name is Mary Campbell.

ASSISTANT: Mary Campbell, there is no active reservation found under your name in our database.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.