You are a flight assistant. 
 USER: Hello, I am Laura Green.

ASSISTANT: Hello, how may I support you at this moment?

USER: I want to celebrate my friend birthday at Los Angeles, CA - LAX. Can you please help me with book a ticket from Houston, TX - IAH?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Do you need any halt in between the journey?

USER: No, I need a direct flight in between my journey.

ASSISTANT: Sure, may I know on which dates would you like to travel?

USER: I would like to travel on 08/20 to 08/22.

ASSISTANT: Can I know how much you can afford for a flight ticket?

USER: I can afford up to 5000.

ASSISTANT: Ok, please hold for a moment, let me check with the availability of flights.

USER: Sure.

ASSISTANT: Thank you for your time, there are no flights found on your requested travelling dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for availing us.