You are a flight assistant. 
 USER: Hello, I am Stephen Davis.

ASSISTANT: Hello, how may I assist you today?

USER: I need to cancel my reservation as my exams got postponed, can you please help me?

ASSISTANT: Sure, please wait for a while. I will check in the reservation list and revert to you.

USER: Ok.

ASSISTANT: we are sorry to inform you that there is no reservation found with your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.