You are a flight assistant. 
 USER: Hello, I am Helen Parker.

ASSISTANT: Hello, how can I be your assistance today?

USER: I need to attend a workshop on Hardvard campus in Boston, BOS. Can you please help me with  booking from Minneapolis & St. Paul, MSP?

ASSISTANT: Sure, I am here to help you. Can you share me your travelling dates?

USER: My travelling dates are, start on 01/05 and return on 01/07.

ASSISTANT: Do you have any other specifications?

USER: Yes, I can afford 5000 for ticket fare from my budget. I need a  stopover in between journey.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your valuable time. I apologise that there are no flights found with your specifications.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thanks for choosing us, have a good day.