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Thank you for emailing Airasia and please accept our apologies for delay in responding to your e-mail.
Thank you for emailing AirAsia and we are sorry for the delay in responding to your e-mail.
Thanks you for emailing AirAsia and we are sorry for late reply.
Thank you for emailing Airasia and please accept our apologies for late reply.
Thanks you for emailing AirAsia and we are sorry for belated reply.
**sorry for the late replying/ Sorry for the/my delayed reply/ response/Sorry for the delay in this reply/response/Sorry for the delay.
Thank you for emailing Airasia and please accept our apologies for belated reply.
Sorry for the/my delayed reply/ response/Sorry for the delay in this reply/response/Sorry for the delay.