You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I need to cancel my ticket, can you help me?

ASSISTANT: Sure. Please let me know your name?

USER: I am Lisa Wright.

ASSISTANT: Ok. Please let me check details with your recent reservation.

USER: Sure.

ASSISTANT: I regret there is no reservation by name Lisa Wright.

USER: That's ok. Thank you.

ASSISTANT: Thanks. Have a nice day.