Oh, no, it can't be. He went to South America for two years.
5 seconds sound clip from the The Philadelphia Story movie soundboard.
You can hear this line at 00:18:24 in the Blu-ray version of the movie.
Quote context
[...]
- One of the servants has been at the sherry again. I'd better go see.
- Dexter! Dexter! You've come back!
- Oh, no, it can't be. He went to South America for two years.
- Edward said they were at the swimming pool. Ah. They seem to be here.
- Dexter, don't you know that tomorrow is the wedding?
- You can go right back where you came from.
- Can't, Red. Dinah says it's too awful here without me.
[...]