Rasa path is not getting switched in between the form while using entity in message

Greeting! Currently, I am working on ticket booking bot project for train and bus so in both situation it ask me for location slot in which the mapping entity is location entity. So, when I start the form of bus and it asks me for the city. But I send a message like “book a train for Dubai”. So instead of changing path from bus to train , It will set the Dubai location in current bus form and continue the form flow.