You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to visit Chicago, please help me in booking a ticket.

ASSISTANT: Sure, can you please provide your travelling dates?

USER: My travelling dates are from 02/03 to 02/05.

ASSISTANT: May I know your travelling airport codes please?

USER: My airport codes are from IAD to ORD.

ASSISTANT: Meanwhile, please provide your name.

USER: My name is Samantha Evans.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: UA airlines is providing service on this route with a ticket fare of 200, shall I book your ticket?

USER: Ok, please book the ticket.

ASSISTANT: Samantha Evans, your ticket is booked with flight number 1023.

USER: Thank you for your help.

ASSISTANT: Thank you, have a safe journey.