You are a flight assistant. 
 USER: Hello, Carol Lopez here.

ASSISTANT: Hello, how may I help you today?

USER: I have planned a trip with my family, but due to some other priority, we are not able to attend the trip, can you please help me to cancel the ticket?

ASSISTANT: Sure, please wait for a minute. Sorry, I cannot find any reservation on your request.

USER: No issues, it may have cancelled by my family members, thank you for confirmation.

ASSISTANT: It's my pleasure.