You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: My holiday trip got cancelled, can you please help me in cancelling my reservation?

ASSISTANT: Sure, can you please share your name to check in our portal?

USER: I am Dennis Smith.

ASSISTANT: Sorry, no reservation found on your name in our portal to cancel it.

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

ASSISTANT: Thank you for contacting us.