You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I would like to cancel my recent reservation. Can you help me in this?

ASSISTANT: Sure, may I know your name to check your reservation from our database?

USER: Lisa Martinez here.

ASSISTANT: We regret to inform you that there is no active reservation found on your name to cancel.

USER: No issues, thank you.

ASSISTANT: Thank you for opting us.