You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this flight ticket booking agency?

ASSISTANT: Yes, your at right place. How can I assist you today?

USER: I need to attend a marriage anniversary of my brother in Washington DC, so can you please help me to to get flight ticket from DCA on 06/22?

ASSISTANT: Certainly, I will help you in booking flight ticket.

USER: Thanks.

ASSISTANT: May I know your preferable destination airport code?

USER: Sure, I need to reach IAD airport which is nearest to my destination.

ASSISTANT: Do you need any help from us, for return flight ticket booking?

USER: Yes, I need to return from IAD on 06/24.

ASSISTANT: Sure, just give me a moment, I will inform is there any flight available or not, as per your requested dates.

USER: Ok, please take your time.

ASSISTANT: There is a flight available, as per your requested dates, airline is Southwest and flight number is 1020. Shall I proceed?

USER: That's great. Please go with booking.

ASSISTANT: May I know your name for booking flight ticket?

USER: Sure, please confirm reservation under the name of Angela White.

ASSISTANT: Your flight ticket has been booked successfully.

USER: Thank you for booking.

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

USER: Most welcome.