Python scripts with Lambda, get data from Dynamo DB

Scan table in DynamoDB, get phone list and substitution phone number into PhoneNumber in following scripts. make a phone call via AmazonConnect.
Amazon Connect part has done.
I need Lambda scripts.

tablename: phonelist
key: PhoneNumber
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import boto3

def lambda_handler(event, context):
client = boto3.client('connect', region_name='region')
alert = client.start_outbound_voice_contact(
DestinationPhoneNumber="PhoneNumber",
ContactFlowId="flow id",
InstanceId="instance id",
SourcePhoneNumber="my number"
)
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