Why is the slot value train-arriveby not updated?

[westofsun]

Hi.When I use the test_dials to test my dst model.I found that some slot-values about train-arriveby are not update in the ground truth.
Such as MUL2294 :
"transcript": "i need to travel on saturday from cambridge to london kings cross and need to leave after 18:30",
"system_transcript": "train tr0427 leaves at 19:00 on saturday and will get you there by 19:51. the cost is 18.88 pounds. want me to book it?",
"transcript": "yes please book the train for 1 person and provide the reference number"

From above we can see that the slot-value train-arriveby has changed in the dialog.But why this slot-value is not changed in the ground truth?
This confused me a lot,hope you can have a look,thank you!

[jianguoz]

Hi, I think the ground truth should be updated here, i.e., the value should be either after 18:30 or 19:00.

[westofsun]

Thank you for your reply.But I still get some problems.
First,do we have to add a slot type to express the situation such as: bofore or after xxx ?
Second,the question above is not one.Not just the ground truth doesn't update the slot train-leaveAt,
but the ground truth doesn't add the slot train-arriveby .So I just want to know if this slot should be added here?