B1:Hello this is B1 Company can i help you
B2: I want to speak to B3 please
B1: i'm sorry him is not at office
B2: Ok, please ask him to call me back, i'm have talk about him for product
B1: Give me you name and number please
B2: my name is b2 i'm come form The B2 office and call me number is 09111111111
B1: I'll give her your message. Thank You calling
B2: Thank you goodbye.