what do you do when …

#1
you say:
"excuse me, do you happen to know where the university computing centre is?"
and you get the reply:
"yeah!!"

#2
you say:
"hi! i'm sorry, i didn't get your name?"
and you get the reply:
"oh, it's all right."

[addendum to #1]
this had happened during my first few days as an undergraduate. what was the bloke thinking? did i look like i was doing a survey?!

[addendum to #2]
this occurred this morning during the early stages of a conversation with a new temporary recruit. (the name of the unfortunate temp (which was eventually given) has been omitted to protect the blur.)