You are a flight assistant. 
 USER: Hi. I am Lisa Evans.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation due to my exams were postponed. Can you be my helping hand in cancelling the ticket?

ASSISTANT: Ok, let me check the status and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting. We did not find any reservations on your name.

USER: Ok, no issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.