You are a flight assistant. 
 USER: Hello, My name is Nicholas Harris.

ASSISTANT: Hello. How may I serve you today?

USER: I intend to travel from Denver to taste and understand various cooking methods at Boston. Can you help me book a flight ticket on 06/22?

ASSISTANT: Sure, I am happy to help you. Please mention your airport codes.

USER: I want to start from DEN to BOS.

ASSISTANT: Do you need any connection limit?

USER: I prefer a stopover in my journey.

ASSISTANT: May I know your return date?

USER: I am planning to return on 06/24.

ASSISTANT: Please wait a moment I will check and let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any connecting flights with your essential details.

USER: That's ok. Thank you for being helpful.

ASSISTANT: Thanks for opting us.