You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit Washington to attend a seminar, can you please book me a ticket from DFW to DCA?

ASSISTANT: Ok, please can I know your travel dates to check?

USER: I am planning my journey on the dates of Feb 17 and Feb 19.

ASSISTANT: Ok, please can I know your connection limits?

USER: I prefer direct flight for this trip.

ASSISTANT: Ok, please let me know if you have any other intents.

USER: No, I don't have any other specifications.

ASSISTANT: May I know your name please?

USER: My name is Shirley Turner.

ASSISTANT: Sorry, there are no flight available at your locations to book.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Thank you for choosing our agency.

USER: Thank you for providing information.