You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Alexander Nelson here. I need your help in reserving a flight ticket from DCA to ORD. Can you please guide me?

ASSISTANT: Sure, may I know your travelling dates?

USER: Thank you, my travelling dates are 08/19 and 08/21.

ASSISTANT: Ok, wait for a minute.

USER: Ok, take your own time but make sure that the price limit is 200 or below.

ASSISTANT: Yes Nelson, I have found a flight having a connection limit 1. Shall I proceed?

USER: Yes, please proceed with ticket booking.

ASSISTANT: Yes Nelson, your ticket reserved with the flight number 1023.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.