You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gary Parker here.

ASSISTANT: How can I assist you?

USER: Please cancel my previously booked ticket.

ASSISTANT: Gary Parker, let me check with your previous reservation.Please wait.

USER: Ok.

ASSISTANT: I appreciate your patience. Sorry to inform you, no reservation found by your name.

USER: It's ok, thanks for your response.

ASSISTANT: Thank you for reaching our agency.