You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Gregory Wilson. Me and my family having a vacation trip in this month, we want to visit Carowinds it is in Charlotte, can you please book a flight ticket?

ASSISTANT: Sure, may I know when are your travel dates?

USER: My departure day is 01/21 and return day is 01/23.

ASSISTANT: Please help me with your airport codes.

USER: I want to travel from DCA to CLT.

ASSISTANT: I found an airline which is providing service on that route with flight-1009 on those dates, ticket costs for 100. Shall I proceed booking?

USER: Please proceed.

ASSISTANT: Your ticket has been booked, Wilson. Have a happy journey.

USER: Thank you for your help.

ASSISTANT: Thank you for consulting us.