こんにちは！

I have a question concerning “If”/たら  I was hoping someone could help me with.

Somewhere in Chapter 5 there’s an example sentence that reads:

えいが　を　み　に　いきたかったら　”Cineplex”　に　いきたい　です。
If we go to see a movie, I want to go to “Cineplex.”

I’m confused about the first part, specifically the conjugation of “いく” in the first part of the sentence (in bold).

I was expecting it to conjugate to いったら、like in this example a page or two previous:

わたし　は　とうきょう　へ　いったら、でんしゃ　で　いきます
If I go to Tokyo, I will go by train.

Can someone please explain what’s happening with いきたかったら？

Thanks for the help,

-エリク