I am looking to travel Perth to Dubai in May. Looking at options it is possible to book Per to Sin return and Sin to DXB return for about $A700 cheaper than I can book Per to DXB return. If I booked 2 separate tickets can I reconsolidate into one booking? Reason I ask is the best return has a 2 hr layover and I wouldnt want to be arguing if there is a missed connection. I could book a later departure or purchase insurance but would just prefer to hand responsibility to SIA.