You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Charles Hernandez here.

ASSISTANT: How can I aid you at this moment?

USER: I want to travel from PHL to IAH for attending a seminar. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I can help you in booking flight ticket. Can you please mention your travel dates for booking flight ticket?

USER: My travelling dates are from 05/18 to 05/20.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, I will wait. Make sure my connections limit is 1.

ASSISTANT: Sorry no connecting flights available in this route as per your requested dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.