trying to book a C/F award ticket using the United website..but when i put in my desired cities and dates, I get very little if any availability....However, when I put in segment by segment, I get the desired flights at the redemption level I want also..... If I call, I can most likely tell the agent to book the flights I want with the miles I have....but is there a way to do this online so I can dodge the call center fees?? Im trying to book CGN-CLT-PDX....and If I choose multi-city, it says ERROR (im putting in CGN-CLT as first city pair and then CLT-PDX as second city pair--same day travel). Thoughts? advise? thank you!