You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sharon Collins.

ASSISTANT: How can I aid you today?

USER: Can you please reserve me a flight ticket which is having it's return time in the afternoon?

ASSISTANT: Sure, I am here to help you with that. May I know your travel dates please?

USER: My trip dates are 08/20 - 08/22.

ASSISTANT: Let me know your airport codes please.

USER: My airport codes are DEN - IAD.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Is there any other preference?

USER: No, thank you for asking.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Southwest airlines is providing you the connecting flight which departs at 18 PM and arrives at 14 PM. Shall I proceed?

USER: Please reserve.

ASSISTANT: Your ticket has been reserved with flight-1024.

USER: Thank you.

ASSISTANT: Thank you for reaching us.