You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I need to cancel my recent ticket because my planned trip got cancelled. Can you please help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: May I know your name to check out your reservation status?

USER: My name is Sandra Lewis.

ASSISTANT: Ok, wait for a while, let me check out.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found on your name in our records to cancel.

USER: It's ok, not a problem with that one. Anyways thank you for checking my ticket status.

ASSISTANT: Welcome and thank you for reaching us.

USER: You are welcome.