You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hi,. May I help you?

USER: I want to book a flight please help me.

ASSISTANT: Sure I will help you in booking ,Please provide me your details .

USER: I'm Deborah Baker. I want to travel from NC - CLT to TX - DFW. The price limit is 1000.

ASSISTANT: Please provide me your date of travelling .

USER: The departure is on 08/27 and return is on 08/29.

ASSISTANT: I am sorry Mr Deborah Baker ,I could not find any reservation on your name . I am sorry Mr Deborah Baker I could not find flight on your dates & location .

USER: Thank you for your help.

ASSISTANT: Thank you .