You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help that you need from us?

USER: On the occasion of Republic day, I would like to distribute some books to the school children. So I would like to travel Washington to reach an international store to buy books in whole sale. Can you find a flight ticket for me?

ASSISTANT: Sure, I am happy to help you. May I know the dates of your journey?

USER: Sure, I want to travel for two days that is 06/26 and 06/28.

ASSISTANT: May I know your location codes?

USER: Ok, my airport codes are from DFW to DCA.

ASSISTANT: Please give me a moment.

USER: Make sure that the connection limit is 1.

ASSISTANT: May I know your name for reference purpose?

USER: Yes, I am Kathleen Perez.

ASSISTANT: Sorry, there are no flights that are travelling on your dates due to tornado alert.

USER: Ok, no problem. Anyway's thank you for your information.

ASSISTANT: Thank you for approaching us, have a nice day.