You use the term "I" which I take to mean only you travelled.. An airline ticket has space for up to 4 flights. Thus ticket xxxxxxxxxxx94 can contain London/Dubai/Kochi/Dubai/ London. You appear to have had four ticket numbers although the way you group them suggests they were each for between 5 and 8 flights (2 sets of four issued "in conjunction". Your grouping could mean there were two of you and the tickets included flights before London and/or after Kochi or that you (alone) had four separate tickets; 94 for London/Dubai 95 for Dubai/Kochi 96 for Kochi/Dubai and 97 for Dubai/London. That can have a significant effect on how the EU regulation applies.