You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a direct flight from CO to attend a business meeting in TX.

ASSISTANT: Please provide your trip dates.

USER: 04/26 and 04/28 are my planned travelling dates.

ASSISTANT: Do you need any connection limit?

USER: I have already mentioned above.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: There are no flights available on your routes.

USER: That's ok, not an issue.

ASSISTANT: May I know your name for documentation?

USER: I am Brian Turner. Thank you.

ASSISTANT: Thank you for choosing us.