You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Brenda Parker.

ASSISTANT: Ok.

USER: Can you please book a direct flight for me to attend a seminar on social issues.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your trip dates?

USER: My journey dates on 09/12 and 09/14.

ASSISTANT: Where you need to catch the flight and land?

USER: My journey points are, Dallas & Fort Worth, DFW to Chicago, ORD.

ASSISTANT: Sorry to inform you that, There are no flights in your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for your response.