You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Margaret Smith, I need to cancel my reservation as my reservation got cancelled.

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you.

ASSISTANT: Sorry Margaret, there is no reservation found in our database.

USER: Ok no issues, thank you for your services.

ASSISTANT: Thank you for choosing us.