You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking from DCA to DEN?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are from Sept 21 to Sept 23.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the afternoon time.

ASSISTANT: Please help me with your name for booking.

USER: My name is Frank Hernandez.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 200 with flight number 1008. Shall I proceed with this flight?

USER: Ok, proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.