I don't know if I can ask about this in this site. But anyway I'll give it a shot. (This question is a spin-off from EL&U.)
Here is a skit from a radio English conversation program, dealing with American English.
A: guest B: front desk clerk C: A's wife
(at the front desk of a hotel)
A: I have a reservation for a room under the name of Hal Lloyd.
B: I can't seem to pull up your reservation. Do you have a confirmation number?
A: It's 7228.
B: Here it is. We don't have any more standard rooms available. I'm going to put you in our deluxe room with a kitchenette.
A: That's fine with us.
(in the deluxe room)
A: The room is decorated very tastefully.
C: It's very nice! I'm going to sit down in this plush sofa and read.
I hear that some people say C's “I’m going to …” line is a little strange. I'd like to know the reason why this sounds strange and how you would feel from the sentence in detail. Also, I'd like to know what words you would use to rewrite it as a scriptwriter.
I'd appreciate it if you could help me.