You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you?

USER: Due to emergency health problem I am unable to attend conference. Can you please cancel my recent reservation?

ASSISTANT: Sure, let me know your name?

USER: Lisa Perez.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel the reservation.

USER: ok no issue. Thanks for your quick response.

ASSISTANT: Thanks for approaching us, have a good day.