You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Debra Clark here.

ASSISTANT: How may I assist you today?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I will help you. Please allow me a minute.

USER: Ok.

ASSISTANT: Debra Clark, I am really sorry to inform you that there is no booking found on your name.

USER: Not a problem. Thank you.

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