You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I oblige you today?

USER: Will you assist me in booking a ticket from IL - ORD, Chicago, under my name Raymond Perez?

ASSISTANT: Sure, do you need any stopover in between journey?

USER: No, I need a direct flight.

ASSISTANT: Ok, may I know your airport codes?

USER: I want to land at CO - DEN, Denver.

ASSISTANT: Kindly mention when you want to travel?

USER: My travel dates are 01/16 and 01/18.

ASSISTANT: Ok, please hold a moment.

USER: Sure, I will.

ASSISTANT: Thanks for your valuable time, unfortunately we did not find any flight on that day.

USER: Ok, not an issue. Thanks for the information.

ASSISTANT: Thanks for availing us.