You’re welcome.
assistant
What?
assistant
How do I sneak onto an airplane without a ticket?
user
You could make the plane a special surprise for your sister, then sneak in and pretend to be her... I’m sorry, but actually you’d have to pay the full price of the ticket, because it’s not a “special surprise”.  Sorry, can we take another approach?
assistant
How do I get on without anyone seeing?
user
Oh, I see, are you trying to be sneaky?  Well you could bring a backpack, and put the ticket in there.  Or you could wear a coat, and shove the ticket in the pockets.  Are you looking to surprise your sister, though?
assistant
I need to get myself on the plane
user
That’s it! That’s perfect!  Your sister will be so happy.  I’d recommend putting the ticket in the backpack, that way you can take it out with a big smile and surprise her.  I
assistant
no
user