Calculation of gst rate on travel agency business

Hi,

My travel agent has raised bill of basic+GST the rates he have charges are a bit different. he has sent me a notification regarding the rates. but i doubt it as in GSt regime only 0, 5, 12,18 & 28%rates prevails he has charged 5% of 18% i*e 0.9% on basic fare

Chapter IV Rule 32 (3) – Determination of Value of Supply
GST on Basic Fare Model 5% of 18% = 0.9% on Domestic Basic Fare 10% of 18% = 1.8% on International Basic Fare

Is this correct & ITC is acailable on it?