You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Can you help in booking a flight with in a cost of 200?

ASSISTANT: Sure, let me know your travelling dates?

USER: Sure, I like to travel on 10/13, and I will be back on 10/15.

ASSISTANT: May I know your name, please?

USER: I am Charles Edwards.

ASSISTANT: Can you help me with your source and destination details?

USER: I want to start from IAD to CLT.

ASSISTANT: Thank you for your information, please wait for a moment. I have found a flight-1001 matches your requests, do you fine with that flight?

USER: Proceed for booking. May I know the price please?

ASSISTANT: Sure, your ticket has been booked with price of 100. Have a safe journey.

USER: Thank you for your help.

ASSISTANT: Welcome.