Corrected sentence is, "Mrs. Jansen, I have a question for you. Are we going to St. Cloud on Thursday? I was wondering if I should ask Ms. Stoll if we are or not."
Explanation of errors,
Missing punctuation: The sentence is missing commas to separate the speaker's name and the question being asked.
Run-on sentence: The sentence is a run-on, meaning it includes multiple independent clauses that should be separated into multiple sentences.
Word omission: The sentence is missing the word "if" between "I was wondering" and "I should ask".
Hence the sentence which is correct is, Mrs. Jansen, I have a question for you. Are we going to St. Cloud on Thursday? I was wondering if I should ask Ms. Stoll if we are or not.
The complete question is, Please correct the sentence, Mrs. Jansen I Have A Question For You Are We Going To St. Cloud On Thursday I Was Wondering I Will ask I'd That I Ask Ms. Stoll if We Are Or Not.--