Jacob: Dear prof. Daniel, thank you for visiting our seminar.
Daniel: I was honoured to be part of this project.
Jacob: The students were very excited about your presence. There are many admirers of your work at out university.
Daniel: Thank you. It was inspiring to see you all and listen to some fresh ideas.
Jacob: Inspired by your lecture, we were thinking about starting a working group about existentialism 
Daniel: What a great idea!
Jacob: Would you agree to be our liaison professor at the department?
Daniel: With pleasure. Drop me an email with more details, please. Whatever you would like to do. It doesn't need to be well defined or formal.
Jacob: Thank you very much, you will receive the email soon.
Daniel: Have a good night!
Jacob: You too, good night!
Daniel's cooperation with Jacob on his project was a success. Daniel will be the liaison professor at Jacob's department. 