You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jeffrey Collins here.

ASSISTANT: Jeffrey Collins, how may I assist you today?

USER: Due to inconvenience of my work, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Sure, I will try to help you. I am sorry to inform you that there are no active booking on your name.

USER: Anyway, thanks for the information.

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