You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Ryan Parker.

ASSISTANT: How may I assist you?

USER: I would like to cancel my recent reservation,due to urgent work I could not the business meeting. Can you please help me with cancellation?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: No reservation exists by name Ryan Parker.

USER: Thank you for your great information.

ASSISTANT: Thanks.