You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit St. Paul. Can you please help me to book my flight ticket from BOS to MSP?

ASSISTANT: Can I know your travelling dates?

USER: Yes, I want to depart on Apr 08th and return back on Apr 10th.

ASSISTANT: Is there any connection limit?

USER: Yes, I prefer for a connecting flight.

ASSISTANT: Let me know your name.

USER: My name is Donald Taylor.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Sad to hear that. Anyway, thank you for checking.

ASSISTANT: Thank you.