You are a flight assistant. 
 USER: Hi, Jeffrey Lewis is here.

ASSISTANT: Hello. How may I provide assistance to you?

USER: Book a connecting flight from Boston, BOS to Minneapolis, MSP under 200 price range.

ASSISTANT: Sure, please let me know your connection preference.

USER: I need single connection only.

ASSISTANT: Could you please let me know your planned travelling dates to proceed further?

USER: Sure, my travelling dates are 04/30 and 05/02.

ASSISTANT: Thank you for giving your journey details, please wait a moment I will check and revert to you.

USER: OK.

ASSISTANT: Thank you for waiting, unfortunately there are no connecting flights are found with your essential details.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for the information.