You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I need to buy a plane ticket from CLT to DFW. Can you help me?

ASSISTANT: On which dates would you like to travel?

USER: I will start on Apr 20 and return on Apr 22.

ASSISTANT: Do you need a lay by in between the journey?

USER: Yes, I need 1 stop over.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your good name please?

USER: I am Gregory Lopez.

ASSISTANT: We found a Southwest Airlines with fare of 200 and a lay by in between the journey matches your schedule.

USER: Fine, please proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1015.

USER: Thanks for your support.

ASSISTANT: Thank you for reaching us.