You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: could you help in booking a flight ticket from BOS to MSP?

ASSISTANT: Can you provide the dates?

USER: OK, my travelling dates are 01/15 to 01/17.

ASSISTANT: Wait a minute.

USER: OK,sure.

ASSISTANT: May I know your name?

USER: Yes,my name is Ashley Roberts.

ASSISTANT: Sorry, there is no flight found. Thank you.