You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Benjamin King here.

ASSISTANT: Welcome to flight booking agency King. How may I assist you at this moment?

USER: I want to attend a Seminar in Philadelphia. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable origin and destination airport codes for booking?

USER: My airport codes are from IAH to PHL.

ASSISTANT: Ok, may I know your departure and return dates of travelling?

USER: My travelling dates are from 02/19 to 02/21.

ASSISTANT: Please wait a moment to check the flights availability in your route.

USER: Make sure my connections limit is 1.

ASSISTANT: We regret to inform you that there are no connecting flights available in your route with your planned dates of travelling.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us, hope you have a great day.