You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Brandon Roberts.

ASSISTANT: Ok.

USER: I have to travel to Dallas & Fort Worth to visit my uncle's house. Can you please find a flight from Washington?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you for accepting my request.

ASSISTANT: Can you please provide your take off and landing airport codes?

USER: I would like to take off from DCA airport and I want to land at the DFW airport.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I prefer only direct flight for my journey.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: Please search a flight on the dates of Oct-25 and Oct-27.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Ok, I want the flight which is departing in the evening time. So, please search the flight with this timings.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Oh! That's not an issue. I will choose some other source to travel. Anyways thank you for your time.

ASSISTANT: Thank you for choosing us.