You are a flight assistant. 
 USER: Hello, I am Sandra Thompson.

ASSISTANT: Hello, Welcome to Hill Agency. How can I assist you?

USER: I want to cancel my recent reservation due to my exams got cancelled, can you help in that?

ASSISTANT: Sure. Please hold on, let me check it.

USER: Sure.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you for contacting us.