To contact a friend, you can say:
"Can I reach out to my friend?"
"I'd pke to get in touch with my friend. Do you know how I can contact them?"
"I'm trying to contact my friend. Do you have their phone number or email address?"
"I need to speak with my friend. Do you know how I can reach them?"
"I want to contact my friend. Do you have any information on how I can get in touch with them?"
"I'm trying to get in touch with my friend. Do you know how I can contact them?"