Ref. No. 40/912
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
If the lady reaches her destination and intends to stay there for 15 days or more, she has to perform full salah i.e. 4 rakats. However, if she is there only for few days i.e. less than 15 days, she will have to do Qasr and instead of performing 4 rakats of obligatory prayers she should perform only 2.
And Allah knows best
Darul Uloom Waqf Deoband