You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, may I know your name to check the reservation status?

USER: My name is Sandra Miller.

ASSISTANT: Sandra we found your reservation and it has been cancelled successfully.

USER: Thanks for your kind service.

ASSISTANT: Thank you for choosing us.