You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation due to sudden postpone of my exams date. Can you help me with that?

ASSISTANT: Sure, but on whose name you previously booked?

USER: I am Susan Jones.

ASSISTANT: No reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.