You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Angela Clark here. Could you book my ticket in economy class?

ASSISTANT: Sure Clark, may I know your airport codes please?

USER: My genesis and terminus airport codes are CLT and DTW.

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: My itinerary dates are Dec 11 and Dec 13.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: I found a flight with the connecting flight of fare 100 with the Southwest airline, are you ok with this booking?

USER: Please book my ticket.

ASSISTANT: Ok, I have confirmed your ticket with the flight number 1004.

USER: Thank you.

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