You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: John Mitchell here.

ASSISTANT: How may I assist you today?

USER: Can you book a flight ticket for my airport codes that is from DTW to IAH?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates for the journey will be from Dec 25 to Dec 27.

ASSISTANT: I found a flight with 2 halt and price 100, shall I proceed?

USER: I am happy with the fare. You can book it.

ASSISTANT: Your ticket has been booked with flight number 1003.

USER: Thank you.

ASSISTANT: My pleasure.