You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service do you need from our agency?

USER: Can you please book a flight ticket from CLT to DCA?

ASSISTANT: Sure, I am happy to serve you to book the ticket. Could you please provide me your travel dates?

USER: Thank you. I have planned my travel dates as Dec 27 and Dec 29.

ASSISTANT: Which flight do you choose either a direct flight or a connecting flight?

USER: I am looking for direct flight so please make sure that.

ASSISTANT: Ok, do you have any other preferences?

USER: No, I do not have any other specifications.

ASSISTANT: Can you please let me know your good name?

USER: Sure, myself Mark Moore.

ASSISTANT: We have found a flight ticket for you which is suitable to your requirements and this flight is departing in the evening time and returning in the afternoon time. Would you like me to reserve the ticket?

USER: That is fine,  please proceed with booking.

ASSISTANT: I have booked your ticket with the flight-1017.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our agency.

USER: Most welcome.