You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Mark Walker here. I want to attend a seminar regarding new trends in Agriculture. Can you please help me for booking the flight ticket?

ASSISTANT: On which dates you are willing  to travel?

USER: My departure date is 04/07 and return date is 04/09.

ASSISTANT: May I know your airport codes?

USER: My airport codes are from HOU and PHX. Make sure my price limit is 200.

ASSISTANT: There is a direct flight available for you. Can I proceed?

USER: Make sure my connections limit is 1.

ASSISTANT: Sorry for 1 connection, there is no flights.

USER: Anyway, thank you for the information.

ASSISTANT: Most welcome.