matching responses

so i had a quiz about matching responses and most of them were easy just this one that i cant understand at all i dont know why i think its strange to me.

the sentence was "thank you for coming today"

and the only response that can match with it at the quiz is "not at all, thank you for seeing me"

its strange to me because why do they say "thank you for seeing me" while the first person said "thank you for coming" its like the first person is the one that came i dont understand