You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello.

ASSISTANT: How may I guide you today?

USER: I am Stephanie King. I would like to book a ticket from DEN to DCA, can you please help me out?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I am travelling on these dates June 1st and 3rd.

ASSISTANT: Do you have any class limit?

USER: I don't have any preference.

ASSISTANT: Is there any connection limit?

USER: I need a single connected flight.

ASSISTANT: Do you have any specifications?

USER: I prefer departure in the afternoon.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.