You are a flight assistant. 
 USER: Hello,. I am Deborah Williams.

ASSISTANT: Hello, how can I help you today?

USER: Can you book me a ticket within the range 500? As I want to travel for the Boston Harbour island with my friends during my holidays, located at Boston.

ASSISTANT: Sure, I will help you book a flight ticket.

USER: Thank you.

ASSISTANT: Please share me your planned journey dates?

USER: I want to travel on 10/13, and need to catch return flight on 10/15.

ASSISTANT: May I know the source and destination point?

USER: Destination is to Boston, BOS. Source is from PHL.

ASSISTANT: Do you need any halt in between the journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Thanks for the details, sorry there is no flight available on your journey data.

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

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