You could always put the name of a random object in the blank space. How about "Hello My Name Is Peanut Butter Sandwich." Or "Hello My Name Is Jellyfish."
How about Peanut Butter and Jellyfish?
Or my fathers' "Hello My Name Is Rupert Bagbee." I saw him write that on a name tag once. He went the whole night laughing because everyone he didn't know was calling him Rupert (his name is actually Douglas). My family was in on the joke too so it was pretty hysterical....I guess you had to be there. :D