Mum went to a work party but she never came back? 

She said she’ll be back at 9am today but it’s 12:30pm now

She isn’t picking up her phone, no texts are going through etc etc

Dad has called her no answer. She said she was staying in a hotel with her friend for the party?

We are all worried. What do I do? She’s 45 I’m 21
Call the hotel and see if they can locate her. Retrace her last known locations. If you are unable to find or contact her, you should look into getting help from the authorities.
Call the authorities and also all known friends and relatives who is close to mom. Also keep in touch with your da and if possible talk to someone who can reach out to the mobile phone operator to find where your mother's mobile phone was last loctaed.
It's natural to be concerned when someone you love hasn't returned home or contacted you as planned. Here are some steps you can take to address the situation:

Stay calm: It's important to remain calm and collected in situations like these, as it helps you think more clearly and make better decisions.

Check with friends and colleagues: Try to get in touch with the friend she mentioned she was staying with or any of her colleagues who might have attended the party. They may have information about her whereabouts or well-being.

Contact the hotel: If you know the name of the hotel where your mom was supposed to be staying, give them a call and ask if they have any information about her or her friend. They may be able to help you locate her.

Reach out to other family members: Inform close family members about the situation, as they may be able to provide support or additional information.

Give it some time: Sometimes, people lose track of time or encounter unexpected situations that prevent them from making contact. It's possible that your mom is dealing with an unforeseen issue and will be in touch as soon as she can.

File a missing person report: If a significant amount of time passes and you still haven't heard from your mom, consider contacting your local police department to file a missing person report. They can help you in locating your mother and ensuring her safety.

Stay hopeful: It's essential to maintain a positive mindset and stay hopeful during this challenging time. Remember that there could be a variety of reasons why your mom hasn't been in touch, and many of them may not be cause for alarm.