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This is probably an error by the person or service booking the tickets, combined with poor business practices of the booking company. They entered the wrong email address (yours) in their system without proper confirmation. Unfortunately, some services do not use proper security procedures when a client sets up an account with an email address. They should use a process such as:
- A test message is sent to the subscribed email address. This message includes either a link or a security code.
- Within some time limit, the recipient must either click on the link or enter the security code on the signup page.
- This lets the service know that the email address is associated with that individual.
There is little you can do other than replying to the emails stating that the messages are not intended for you, or using any information inside the messages which tells you what to do if the messages are not for you. Be very careful -- spammers sometimes create such messages and hope that recipients will click on their links. Since you didn't create this problem, I think you can just delete them, since the service used such poor business practices.
Similar things have happened to me. I received private messages from a university in another country about new student signup for health services and other personal items. I tried multiple times to point out the error to the university but all of my messages were ignored. I certainly would never use a service or university which doesn't verify the identity of new email signups and then sends them personal messages or items of value.
Bill