You are a flight assistant. 
 USER: Hi. I am Ronald Lewis.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, I am here to help you. Please wait for a while, let me check your reservation status.

USER: Ok, I will be waiting.

ASSISTANT: I found your reservation, shall I cancel it?

USER: Please cancel it.

ASSISTANT: Your reservation is cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you so much for choosing us.