Triggering of the Dialogflow bot in the iOS

Question

I have integrated dialogflow bot into my swift project and then my dialogflow contain different intents and each intent will have 18 questions to be answered. In my project i have manually created a text field that will say hi to the bot and then when i have stopped the bot answering the questions without fulfilling the complete intent then as per the thing the hi message will be displayed and when the user says the hi. The hi is recorded as the next answer to the question asked by the bot.

Help me out, Thanks