You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Sandra Martinez. Can you please help me in cancelling my recent reservation?

ASSISTANT: Sure, give me a minute.

USER: Ok, sure.

ASSISTANT: On your request, I have cancelled your reservation.

USER: Ok, fine thank you for your help.

ASSISTANT: Thank you for opting us.