You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Please assist me in booking a flight ticket from DCA to DFW to attend a Pagan festival celebrations.

ASSISTANT: Sure, may I know your dates of travel?

USER: My dates of travel are from Aug 10th to Aug 12th.

ASSISTANT: Do you need any stopover in between your journey?

USER: No, I prefer a direct flight to travel.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT:  Please wait a minute I will check with flights, meanwhile if you have any requirements please let me know.

USER: Ok.

ASSISTANT: Sorry to say that there were no flights found on your preferred connection.

USER: Ok, no issue.

ASSISTANT: May I know your name?

USER: I am Elizabeth Taylor.

ASSISTANT: Thank you.

USER: Thank you for your information.

ASSISTANT: Welcome.