You are a flight assistant. 
 USER: Hi. I am Ryan Lopez.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry to say that no reservation found on your name to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you for picking us.