You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I want to book a flight ticket from IAH to DCA. Could you help me in booking?

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: My travelling dates are from July 02 - 04.

ASSISTANT: May I know your connection limit?

USER: I prefer for connecting flight.

ASSISTANT: May I know your good name?

USER: Janet Brown.

ASSISTANT: Please wait for a minute. Sorry to say that, there are no flights available based on your travelling dates.

USER: Ok, please check with the normal-cost airline. That's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.