Is the sentence correct? 'You must change your train at South Norwalk'.

[learning54]

Hi teachers,
Is the sentence below correct?
A booking clerk is telling someone, 'You must change your train at South Norwalk'.

Thanks in advance

 

[Rover_KE]

He would say 'You must change (trains) at South Norwalk'.

He'd probably omit 'trains' as it's obvious what he's talking about.

Rover

 

[learning54]

Hi Rover,
Thank you so much for your reply.

Best,
L54