You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Shirley Perez here.

ASSISTANT: How can I assist you at this moment?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I will assist you with that. Please wait a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: Not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.