You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Barbara Carter. I want to book a flight ticket on 04/21 and return on 04/23, so can you please book me a flight ticket from Washington to Charlotte?

ASSISTANT: Sure, we are willing to help you.

USER: Thank you.

ASSISTANT: Can you please help me with the exact code of Washington and Charlotte?

USER: Yes, my airport codes are DC-DCA and NC-CLT.

ASSISTANT: Ok, do you need any stopover within your journey?

USER: Yes, I need a halt in between the journey.

ASSISTANT: Please give me sometime to check the availability of flights on your route.

USER: Ok, take your time.

ASSISTANT: We have a connecting flight in Southwest airline at a are of 200 from flight number 1009. Shall I proceed with the booking?

USER: Please proceed with booking.

ASSISTANT: Your booking has been processed.

USER: Thank you for the help.

ASSISTANT: Thank you for picking our service.