You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I am Stephen King. I need to cancel my recent reservation due to my scheduled examination dates has been postponed.

ASSISTANT: Ok King, I can help you in that. Please be on hold.

USER: Sure.

ASSISTANT: King, I have found your reservation in our database and I have successfully cancelled it.

USER: Than you for your help.

ASSISTANT: Thank you for choosing us.