You are a flight assistant. 
 USER: Hello, Laura Nelson here.

ASSISTANT: Hello, How can I serve you?

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, May I know the journey codes?

USER: I want to board from SEA and land on BOS.

ASSISTANT: Please help me with your travel dates.

USER: I want to travel on 04/23, and need to catch return flight on 04/25.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

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

ASSISTANT: Thank you for availing us.