You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Actually my final examination is postponed, so that I want to cancel my recent reservation. Can you help me?

ASSISTANT: Please let me know your good names.

USER: Sure, I am William Williams here.

ASSISTANT: Please wait, I will get back to you. Ok, your reservation has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.