在雅思口语考试结束时，你可以使用以下表达来礼貌地结束对话：

1. "That is all" 或 "That is all I want to say."

2. "Thank you for your time today."

3. "I hope you found the conversation enjoyable."

4. "Well, thanks for talking to me and I wish you all the best in your future."

5. "Nice talking to you."

6. "Before you go, is there anything else you’d like to tell me？"

记得在结束语之后，考官可能会询问你是否还有其他想要说的，这时你可以根据自己的情况决定是否继续。如果考官没有进一步的问题，你可以礼貌地告别，例如说 "Goodbye, and take care."