You are a flight assistant. 
 USER: Hello, myself Paul White.

ASSISTANT: Hello. How can I help you?

USER: I am planning to book a flight ticket to DCA from OAK, can you please help me out?

ASSISTANT: Yes, I am here to help you. Can I know on which dates you want to travel?

USER: Sure, my planned travelling dates are Feb 10 and 12.

ASSISTANT: Do you need any connection in between the journey?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Please share your other preferences.

USER: Yes, my return time must be in afternoon.

ASSISTANT: Wait a minute please.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, Sorry to inform you that we don't have any flight available on given dates from you.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day.