You are a flight assistant. 
 USER: Hello,. I am Joshua Martin.

ASSISTANT: Hello,. Please let me know, How can I aid you for the day?

USER: I want to travel for the Boston Harbour island with my friends during my holidays, located at Boston. Can you book me a ticket within the range 200?

ASSISTANT: Sure, I am euphoric to help you.

USER: Thank you.

ASSISTANT: Let me know your travelling airport codes for both airports?

USER: I need to leave from my nearest airport DTW to reach BOS.

ASSISTANT: Ok, please let us know, on what dates you are willing to travel & return?

USER: I want to travel on 10/18, and need to catch return flight on 10/20.

ASSISTANT: Thanks for the details, please wait.

USER: Sure.

ASSISTANT: Sorry Joshua, Unfortunately there are no flights found on your preferable travel dates.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thanks for approaching us.