You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Margaret  Hernandez. Due to having the presentation in science-fair which is to be held at  DFW. I want to book a ticket with 1 connection. Would you help me in ticket booking with the price limit of 500?

ASSISTANT: Sure, we are here to help you. May I know your journey dates?

USER: My journey starts at HOU  in between 06/22 and 06/24.

ASSISTANT: We found a direct flight. It is ok for you?

USER: No.

ASSISTANT: Ok. Thank you for reaching us, have a nice day.

USER: Thank you for being helpful to me.