[Vocabulary] what does the sentence ' do you happen to have a book list for that class' mean ?

[nininaz]

Hi All,
what is the meaning of a below scenario?
W: Hi. May I help you?
M:I am thinking of taking Dr.Perry 's class this summer.Do you happen to have a book list for that class.
W:I can check the computer ....
Is the following meaning correct?
3 [transitive]
to do or be something by chance: happen to be/do something.
Please tell the meaning of sentence.
Thanks.

 

[Rover_KE]

'Do you by chance have a book list....?'