The phrase "I'm fortunate that we collaborated" expresses gratitude for the opportunity to work together and collaborate. It suggests that this collaboration has been fruitful and beneficial.
The statement concludes with "keep in contact at all times," indicating the speaker's desire to maintain the connection and communication with this person, both professionally and personally.
Overall, this statement conveys a sense of appreciation for a productive and positive working relationship that has evolved into a friendship. It underscores the importance of staying connected and maintaining the bond, emphasizing the value of the person in both the speaker's work and personal life.