You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Raymond Smith. I need a flight ticket with a direct flight. Can you assist me with reservation with in the range of 500?

ASSISTANT: Sure, please provide your travelling dates?

USER: My travelling dates are from 02/28 to 03/01.

ASSISTANT: Please provide your journey points to proceed for booking?

USER: I want to attend Comic Con show at BOS from IAD.

ASSISTANT: Sorry, no flights available on given dates.

USER: Ok, No problem. Thanks for your response.

ASSISTANT: Thank you for opting us. Have a good day.