You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I have a entrepreneurship meeting at Washington. Can you please help me in reserving the ticket from MSP to DCA?

ASSISTANT: Sure, May I know the journey dates?

USER: I am planning my trip on Feb 12 and again I will return back on Feb 14.

ASSISTANT: Do you have any connection limit?

USER: I am flexible with single connection.

ASSISTANT: Do you have any class preference?

USER: My class preference is economy.

ASSISTANT: Is there any other requirements?

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

ASSISTANT: May I know your name?

USER: Myself Helen Allen.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Not a big issue, anyhow thank you very much for your service.

ASSISTANT: No problem, Thanks for the information.

USER: You are most welcome.