You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Susan Thomas.

ASSISTANT: Susan Thomas, how may I assist you today?

USER: Due to some business meeting, I am going to cancel my reservation. Can you please help me for this?

ASSISTANT: Sure, I will help you.

USER: Sure, I will wait for your kind response.

ASSISTANT: I am sorry to inform you that there is no reservation done on your name.

USER: Not a big program, anyway thank you very much for your service.

ASSISTANT: Thank you for reaching us. Have a great day.