Amazon Lex SDK可以使用AWS Lambda集成，在Lambda函数中可以定义多个命令。以下是一个通过使用AWS Lambda函数集成Amazon Lex SDK来定义多个命令的示例：

import boto3
import json

def dispatch(intent_request):
    intent_name = intent_request['currentIntent']['name']
    if intent_name == 'GetWeather':
        return get_weather(intent_request)
    elif intent_name == 'BookFlight':
        return book_flight(intent_request)
    else:
        return close(intent_request)

def get_weather(intent_request):
    # 获取用户意图槽位值
    location = intent_request['currentIntent']['slots']['Location']
    # 根据用户输入的地点，查询相应天气并返回
    return {
        "sessionAttributes": {},
        "dialogAction": {
            "type": "Close",
            "fulfillmentState": "Fulfilled",
            "message": {
              "contentType": "PlainText",
              "content": f"The weather in {location} is sunny today."
            }
        }
    }

def book_flight(intent_request):
    # 获取用户意图槽位值
    destination = intent_request['currentIntent']['slots']['Destination']
    departure_date = intent_request['currentIntent']['slots']['DepartureDate']
    # 根据用户输入的信息，发起预定机票操作并返回
    return {
        "sessionAttributes": {},
        "dialogAction": {
            "type": "Close",
            "fulfillmentState": "Fulfilled",
            "message": {
              "contentType": "PlainText",
              "content": f"Your flight to {destination} on {departure_date} has been booked."
            }
        }
    }

def close(intent_request):
    # 无法识别用户意图时，结束对话
    return {
        "sessionAttributes": {},
        "dialogAction": {
            "type": "Close",
            "fulfillmentState": "Fulfilled",
            "message": {
                "contentType": "PlainText",
                "content": "Sorry, I don't understand what you mean."
            }
        }
    }

def lambda_handler(event, context):
    # 根据请求类型，分发请求给不同