You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Charles Garcia here. I want a direct flight from Houston, can you please help me in booking a flight ticket from IAH to LGA?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, my travelling dates are from 08/09 to 08/11.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: I have already mentioned you that I need a direct flight, please check out once.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for opting us.