Chinese phrase
抱歉，无法回电 bào qiàn wú fǎ huí diàn
Meaning
I am sorry I cannot call back
When to use it
It politely says that a return call is not possible. It is a brief apology used in phone messages or service replies when the speaker cannot return a call.
Example dialogue
什么时候能回电话？ shén me shí hòu néng huí diàn huà
When will you be able to call back?
抱歉，无法回电，请留下邮箱和工单号，我们会用邮件联系您。 bào qiàn wú fǎ huí diàn qǐng liú xià yóu xiāng hé gōng dān hào wǒ men huì yòng yóu jiàn lián xì nín
I'm sorry, but I can't call back. Please leave your email address and ticket number, and we'll contact you by email.