You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Unexpectedly my planned trip got cancelled, so, can you please help me to cancel my ticket?

ASSISTANT: Sure, may I know your name please to check the status?

USER: My name in the previous ticket is Patrick Parker.

ASSISTANT: There is no reservation found with your details, Parker.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for contacting us, have a good day.