You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a flight ticket, can you please help me?

ASSISTANT: Sure. Please provide your travelling location names.

USER: I'm Kenneth Lewis, want to travel from HOU to BOS.

ASSISTANT: May I know your travelling dates for booking flight ticket?

USER: My Departure date is from 09/23 and arrival date is to 09/25.

ASSISTANT: Do you have any other special requirements?

USER: My connection flight should be only 1 and the price should not exceed 500.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Kenneth Lewis as per your requested dates no flights available.

USER: OK, no issues. Thank you for the information.