Might or Will? which one is correct?

[Aran.]

Which sentence is correct? this came up in an exam
1-My flight just got cancelled, and I don't know what to do. I might stay here for 2 hours.
2-My flight just got cancelled, and I don't know what to do. I will stay here for 2 hours.

 

[5jj]

Both are grammatical, but only the first works in this context. If the speaker doesn't know what to do, then they can't say what they will do.