You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please help me in reserving the ticket from MSP to DCA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I would like to travel on Dec 3 and again I will return back on Dec 5.

ASSISTANT: Do you have any preferences about flight connections?

USER: I am comfort to travel in single connection flight.

ASSISTANT: Do you have any preferences about class?

USER: I want to return in the afternoon.

ASSISTANT: Please mention your name.

USER: Myself Nicholas Walker.

ASSISTANT: There is no flights found under your preferable details.

USER: Not a big deal, anyhow thank you very much for your kind information.

ASSISTANT: Welcome, have a great day.