You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Mary Miller. I would like to cancel my recent reservation, can you help me in that?

ASSISTANT: Mary Miller, I am glad you have contacted us. I will help you. Please allow me a minute.

USER: Thank you. I will wait for your response.

ASSISTANT: Thank you. Mary Miller, I am really sorry to inform you that there is no booking done on your name.

USER: That's ok, no problem. Thank you for the information.

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