From Warsaw to Lublin using "Contbus", can I get a seat without pre-booking?

Hi guys,
I will come to Lublin this summer. My project coordinator told me that there is a bus terminal which is near airport's exit. I can go to Lublin by using ''Contbus'' (a minibus company) She told me that there will be no problem about finding seats. But I searched online. that's what I got:

''It's best to book by phone at +48 607 66 90 80 between 9:00-17:00. On some days, especially during weekends it may be hard to get a seat without prior booking.''

I will come Friday. I am afraid not to find free seat. I dont want to deal with trains. It is better to use bus because it picks you up from airport directly. (which is a good thing for a foreigner who do not know anything about Poland) What do you think? Do you think that I can find free seat without booking? because I dont speak Polish, I cannot call the company for booking.

If you're picking up the Contbus bus from Chopin airport it is not usually necessary to pre book a seat. The buses run every hour or so to Lublin so if one is full, it won't be too long to wait for the next one.

Do you have accommodation arranged?
If not, we have rooms in our house for rent over the summer. I'm English and my wife is Polish so we can help you with any language related issues.

Have a good trip....

I looked at the schedule for Contbus. From airport, there is only one choice for me as a time because of my flight: 15:15
Thank you, I have arranged my place to stay for a while. :)
If you are sure about finding seat, It is good news.