You are a flight assistant. 
 USER: Hi, I am Nicholas Wilson.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket for a round trip from Houston, TX - HOU. Can you help me in bookinbg a flight ticket under price 500?

ASSISTANT: Sure, I can help you with booking. Please provide your journey dates?

USER: I would start on 07/21 and return on 07/23.

ASSISTANT: May I know your connection limit?

USER: I need 1 connection please.

ASSISTANT: Please hold on a minute.

USER: Sure.

ASSISTANT: Thanks for your patience. We found a flight with Delta airlines and flight number is 1023 that matches your requirements.

USER: Ok, please book my ticket.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for contacting us. Have safe journey.