Graceful ways to break away from a conversation Closing a Conversation

I was just in a telephone call with a Chinese person and I attempted to say something like:

xiè xiè nín de lái diàn 

谢谢您的来电

Had I said this in English, the caller would have recognised this as a closing statement (an attempt to end the conversation gracefully). The caller did not discontinue the conversation at this point so I assume my word choice may not have been correct. How might I have closed the conversation using a more appropriate phrase or sentence?

Similarly, I've seen CLSE questions about breaking the ice (starting a conversation) but none about how to gracefully close a conversation. I would appreciate any help in this area and I do understand that different regions will have variations (all of which I welcome).

Update

Thanks for the answers below and feel free to add more. I make use of this in building my grammar and appreciate the efforts very much. I also received this alternative as well:

wǒ men gǎi tiān zài tán bā 
我們改天再談吧
*We'll talk about it another day*
It usually depends on the situation. If it was a company telling me about a product I might be interested in, and I hear them out, I usually end with 谢谢,我再考虑考虑

if it's one of my my friends, I usually make an excuse such as have to go now, have to sleep, have to eat etc... and add something like 我们哪天接着聊吧, or 回头见

If talking to my parents, I usually say 就这件事, or 没有别的事, etc