def sqs_lookup_url(session, queue_name):
    """Lookup up SQS url given a name.

    Args:
        session (Session) : Boto3 session used to lookup information in AWS.
        queue_name (string) : Name of the queue to lookup.

    Returns:
        (string) : URL for the queue.

    Raises:
        (boto3.ClientError): If queue not found.
    """
    client = session.client('sqs')
    resp = client.get_queue_url(QueueName=queue_name)
    return resp['QueueUrl']