You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you at this moment?

USER: I have planned to book a flight on Dec 22nd to participate in Arts competition that going to be held in Houston. Will you please help me in booking?

ASSISTANT: Sure, do you need a lay by in between the journey?

USER: Yes, I usually prefer it.

ASSISTANT: Ok, can you please share your airport codes?

USER: Sure, my airport codes are MSP - IAH.

ASSISTANT: Ok, do you prefer business or economy class?

USER: I am okay with any class.

ASSISTANT: When would you like to return from IAH?

USER: I would like to return on 24th of December.

ASSISTANT: Provide your good name please?

USER: Sure, Lisa Allen is my name.

ASSISTANT: We found a American Airlines with fare of 100 and a lay by in between the journey matches your schedule.

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1000.

USER: Thank you so much.

ASSISTANT: Thank you for reaching us.