You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: Please book a ticket from DCA to ORD.

ASSISTANT: Sure, I am oblige to help you with that. Can you please provide your preferable departure and return dates of travelling?

USER: My departure date is Jul, 11 and return date is Jul, 13.

ASSISTANT: Is there any additional requirements do you want?

USER: I need a connecting flight.

ASSISTANT: Please wait a moment to check the flight on your route.

USER: Sure.

ASSISTANT: Based on your travel details, I have found a flight with a single connection with a fare of 100 from Frontier airlines. If you are ok with this, please inform me to book the flight.

USER: Please proceed.

ASSISTANT: Can I know your name to book the flight ticket?

USER: My name is Michael Campbell.

ASSISTANT: Ok Michael Campbell, your ticket has been confirmed in flight number 1001.

USER: Thanks.

ASSISTANT: Thank you for reaching us, have a great journey.