it is I who should say so; likewise; same to you
A polite phrase used to return a compliment, thanks, or greeting, emphasizing that the feeling is mutual. Often follows ありがとうございます, よろしくお願いします, or すみません.
"Thank you very much." "It is I who should thank you."
"I look forward to working with you." "Likewise, I look forward to working with you."