You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Nancy Wilson here.

ASSISTANT: Ok.

USER: I want to attend a Marriage in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you. Please share your travelling dates.

USER: My travelling dates are 04/23 and 04/25.

ASSISTANT: Can I know your airport codes please?

USER: My airport codes are CLT and IAD.

ASSISTANT:  Do you need a connection in between your journey?

USER: I would prefer single halt.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Ok, please wait a minute.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, we found a flight with number 1020 airline Southwest at a rice of 100 with 1 connection in class economy. Can I proceed with booking?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Sure, your booking is done.

USER: Thanks for helping me.

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