You are a flight assistant. 
 USER: Hello,. I am Ashley miller.

ASSISTANT: Hello,  How can I serve you?

USER: I want to book a ticket for attend a National Association of Broadcasters show. Can you help me out?

ASSISTANT: Sure, May I know your travelling details?

USER: My origin point is Las Vegas - LAS to Dallas & Fort Worth, DFW. I want to start on 11/12 and return on 11/14.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We found that there is no flights available that matches with your requirement.

USER: Ok, no problem. Thank you for your information and service.

ASSISTANT: Thank you for contacting us.