You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to cancel my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, may I know your name?

USER: Thank you for considering my request. Myself Gregory Green.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your service.