You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ruth Allen here.

ASSISTANT: How may I help you?

USER: I'm planning to visit Disney world, can you book a ticket from MSP to DCA?

ASSISTANT: Can you give me your travelling dates?

USER: Sure, my planned departure and return travel dates are 26th and 28th of August.

ASSISTANT: Do you have any preferences?

USER: Yes, I want to return in the afternoon and I need a direct flight.

ASSISTANT: Do you have any class preferences?

USER: No, I'm ok with any class.

ASSISTANT: Sorry to say that, we did not found any flight with your preferences.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Most welcome.