You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I guide you?

USER: I need to book a ticket from Chicago ORD to Dallas DFW to attend an sports ceremony.

ASSISTANT: Ok. May I know your travelling dates for further process?

USER: My travelling dates are 06/30 to 07/02. Make sure that the ticket price should not be more than 200.

ASSISTANT: Let me know your name to book a ticket.

USER: Book a ticket with the name George Lopez.

ASSISTANT: Thank you for waiting.

USER: Sure.

ASSISTANT: You have no flight that matches with your information.

USER: OK, that's no problem.

ASSISTANT: Thank you for connecting  us.

USER: Thank you for helping me.