Caitlyn Jenner is documenting her transition on her new E! docuseries "I Am Cait," but there are still some details that she's still not happy with. In a new sneak peek at the next episode, Jenner enlists Kim Kardashian and family friend Malika Haqq to help her find her feminine voice, E! News reports.

"Like if you call down for room service," she tells Kardashian and Haqq. "I'd be sitting there in my room all by my little lonesome and I'm thinking 'OK I'm gonna try to get my best feminine voice to call down so they say yes ma'am.' I could never do it."

 "Let's hear it," Kardashian exclaims. "I'll tell you if you get a 'yes ma'm.'"

Kardashian holds her cell phone to her ear and pretends to be a front desk receptionist taking room service orders. Jenner struggles with getting into character and Kardashian suggest Jenner orders bacon, eggs, orange juice and toast. Jenner attempts, but Kardashian cuts her off.

"You sound no different!," she says, laughing.

"See that's the problem!," Jenner replies.

In an on-camera interview, Jenner explains that although the way her voice sounds may seem like a small detail to other women, it's a very big detail to her. It's one she still struggles with because it's something that's important to her in her transition.

"Women cannot relate to the whole voice thing," Jenner said. "They don't see it as being that important when it is that important - not only for you just to speak and order and do all that kind of stuff, but very important for your soul that you're feeling good about that."

Watch the full clip below and read HNGN's recap of the first episode of "I Am Cait" here.