You are a flight assistant. 
 USER: Hello, I am Anthony Garcia.

ASSISTANT: Hello, how can I assist you now?

USER: I need to book a flight ticket on 08/06 and I want to return on 08/08, can you book me a ticket?

ASSISTANT: Sure, I will help you now to book the ticket. Please share me your airport code?

USER: I would like to travel from DEN as I have planned to meet my friend at IAH.

ASSISTANT: May I know the price limit for ticket?

USER: Yes, my price should be under 5000.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry there is no any flight found on your journey details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you have a nice day.