import re
regex = r"\b(?:03|7[016])[- /]?\d{3} ?\d{3}\b"
test_str = "Hi my name is marc and my phone number is 03-123456 and i would like 2 bottles of water 0.5L"
matches = re.search(regex, test_str)
if matches:
print(matches.group())
aW1wb3J0IHJlCgpyZWdleCA9IHIiXGIoPzowM3w3WzAxNl0pWy0gL10/XGR7M30gP1xkezN9XGIiCgp0ZXN0X3N0ciA9ICJIaSBteSBuYW1lIGlzIG1hcmMgYW5kIG15IHBob25lIG51bWJlciBpcyAwMy0xMjM0NTYgYW5kIGkgd291bGQgbGlrZSAyIGJvdHRsZXMgb2Ygd2F0ZXIgMC41TCIKCm1hdGNoZXMgPSByZS5zZWFyY2gocmVnZXgsIHRlc3Rfc3RyKQoKaWYgbWF0Y2hlczoKICAgIHByaW50KG1hdGNoZXMuZ3JvdXAoKSk=