Can you complete this sentence?

Lufthansa   Sat Sep 29, 2007 5:39 pm GMT
When you go to the airport, you can hear this kind of announcement a lot.
But I am not able to remember/restore the sentence perfectly.

Could you possibly complete/correct the sentence so that it makes perfect sense?

" Attention please. All passengers booked United Airline flight UA 945 to Chicago are now requested to proceeding gate."

I am pretty sure something is missing in the sentence above.
Would you correct the sentence please?
How about this?   Sat Sep 29, 2007 7:36 pm GMT
"Attention please: All passengers booked on United Airlines flight 945 to Chicago are now requested to proceed to the gate".
SJF   Sun Sep 30, 2007 2:02 am GMT
Gate number?