You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Carolyn Williams here.

ASSISTANT: How can I assist you?

USER: I want to book a flight on the route from ORD - DCA, can you help me?

ASSISTANT: Sure, may I know your journey dates please?

USER: I will be travelling on the dates from 04/28, and I will be returning on 04/30.

ASSISTANT: Southwest airlines is having a flight with travel charge of 100, shall I proceed booking?

USER: Ok, please proceed with booking.

ASSISTANT: Your ticket has been booked with flight-1011, have a safe journey.

USER: Thank you for helping me out.

ASSISTANT: Thank you for choosing us.