You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi, how may I guide you?

USER: I am Carolyn Lewis. I have planned to visit Boston to get refresh. So please help me to get a flight ticket.

ASSISTANT: Sure, I can help you. Will you please provide you airport codes?

USER: My airport codes are MN-MSP and MA-BOS.

ASSISTANT: OK, can you provide your dates of journey?

USER: My planned dates are 03/30 and 04/01. Please make sure that the price should be under 500 with connection 1.

ASSISTANT: Sorry Lewis, there is no flights found as per your information.

USER: Oh! It's OK. Thank you for your help.

ASSISTANT: OK, thank you for contacting us.