You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I have a competition in Houston, can you book the flight ticket for me?

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

USER: My source will be from DTW, and destination is IAH.

ASSISTANT: Let me know your dates.

USER: My travelling starts on 06/30 till 07/02.

ASSISTANT: May I know your good name please?

USER: Myself Mark walker.

ASSISTANT: I found a flight for you in Spirit airline with number 1001.

USER: Please, proceed it.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for using our services.