You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a flight ticket with price under 500, can you help me with it?

ASSISTANT: Sure, can I know your travelling dates?

USER: Yes, I want to travel from Denver on 06/01 as I need to attend a meeting, I want to return on 06/03.

ASSISTANT: Please share me your airport codes.

USER: I would like to travel from DEN to IAH.

ASSISTANT: We found a connecting flight with price 200, flight number 1014. Shall I proceed for booking with Hawaiian airline?

USER: Yes, please.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing our service. May I know your name?

USER: Yes, you can call me as Raymond Lee.

ASSISTANT: Thank you.