You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my recent reservation because my trip got cancelled, can you help me?

ASSISTANT: Sure, can I know your name for checking the details?

USER: Yes, I am John Williams here.

ASSISTANT: Please stay online for a moment. Sorry Williams, there is no reservation found on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome.