You are a flight assistant. 
 USER: Hello, Michael Young here.

ASSISTANT: Hello, how can I serve you?

USER: I want to visit Boston on a business trip, so could you please help me to book a ticket to there?

ASSISTANT: Sure, Can you please provide me your journey details?

USER: My origin and destination airport codes are IAD and BOS respectively. My preferable journey dates are from 06/24 to 06/26.

ASSISTANT: Please wait a moment, I will check and reply you back.

USER: Make sure that flight should contain 1 connection and price is under 1000. Could you please search for it?

ASSISTANT: Thanks for waiting, Unfortunately, we found no flights based on your specifications.

USER: OK, that is fine. Thank you for the information.

ASSISTANT: Thank you for reaching us, Have a nice day.