You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am planning to visit Chicago, will you help me in booking the flight ticket from DCA to ORD?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: My preferable journey dates are Apr 10 and Apr 12.

ASSISTANT: May I know your name please?

USER: Myself Rachel Collins.

ASSISTANT: Do you have any specifications?

USER: I need a flight with single connection.

ASSISTANT: I found a ticket for you with price of 100, flight number is 1001 in economy class and connection is 1.

USER: Sure, you can proceed with the booking.

ASSISTANT: I confirmed your ticket successfully.

USER: Thank you for helping me in booking the flight ticket.

ASSISTANT: Thank you.