You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to fly from OAK to DCA. Can you book a ticket from that route?

ASSISTANT: Sure, I'm glad to help you with that. May I know your good name please?

USER: Sure, Pamela Phillips here.

ASSISTANT: Can you please provide your planned departure and return travel dates?

USER: My planned travel dates are 11/25 and 11/27.

ASSISTANT: Do you prefer stopover in between your journey?

USER: Yes, I need a flight with single connection.

ASSISTANT: Please let me know if you have any other specifications.

USER: Make sure that, my return time should be in the evening only.

ASSISTANT: Sorry to inform you that there are no flights available for you which will return in the evening time.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us, have a nice day.