answer: #Person1# advises going to the concert by bike in case of being stuck in traffic. #Person2# agrees and #Person1# suggests a round helmet may be better for #Person2#. Then #Person1# praises #Person2#'s new bicycle and will help #Person2# to fix the brakes and saddle.
documents: #Person1#: are you ready to go the concert?
  #Person2#: yes. Should we go there by bus so we aren't late?
  #Person1#: actually, why don't we go there by bike? We could get stuck in traffic if we travel by bus in such hour.
  #Person2#: that's true. Cycling is good for our environment, too. Let me just get my helmet then.
  #Person1#: is your helmet comfortable?
  #Person2#: not really, but I liked the design, so I got it.
  #Person1#: maybe you should think about getting a round helmet ; they're better.
  #Person2#: I'll think about it.
  #Person1#: is that your new bicycle?
  #Person2#: yes, my father gave it to me for my birthday. Do you like it?
  #Person1#: it's the newest 10 speed cycling mountain bike. These are really expensive!
  #Person2#: nothing but the best from my dad. I like everything about it except for the brakes. They are a bit sticky.
  #Person1#: I can fix those for you. Is there anything else wrong with it?
  #Person2#: well, my saddle is too low for me. Do you know how to change the height?
  #Person1#: that's easy. It's important to have the saddle high enough so that your legs can extend fully when you are on your bicycle.
  #Person2#: is that why my knees have felt sore after every time I've ridden my bike?
  #Person1#: it's possible. Give me a minute and I can fix these for you and then we can go.