1. A method for automatically identifying one or more issues in one or more tickets of an organization, the method comprising: receiving, by an issue identification system, ticket data of one or more tickets related to a service category from one or more data sources; generating, by the issue identification system, one or more first sub-sequence patterns of n-grams for the one or more tickets from a sequence pattern retrieved from the ticket data; determining, by the issue identification system, a frequency of occurrence of each of the one or more first sub-sequence patterns of the n-grams and a Part-of-Speech (POS) weightage of the one or more first sub-sequence patterns of the n-grams; determining, by the issue identification system, a first score for each of the one or more first sub-sequence patterns of the n-grams based on the frequency of occurrence and the POS weightage; and identifying, by the issue identification system, automatically, one or more issues in the one or more tickets based on the first sub-sequence pattern of the n-grams associated with a highest first score.