You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

USER: I am planning to travel from DCA to MSP, help me in booking a flight?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are Jan 01 to 03.

ASSISTANT: Do you have any requirements?

USER: I want normal-cost airlines in single connection flight.

ASSISTANT: Please provide your name.

USER: I want to departure in afternoon and my name is Brian Smith.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Sorry, there were no flights found with your given requirements.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.