You are a flight assistant. 
 USER: Hello, I am Carolyn Lopez.

ASSISTANT: Hello, How can I assist you the day?

USER: Can you please book a flight ticket to Houston, HOU as I am planning to visit Waterwall?

ASSISTANT: Sure, Is there any price restriction?

USER: Yes, I can afford up to 5000.

ASSISTANT: Can you provide your travel dates?

USER: I intend to start on 08/22 and return on 08/24.

ASSISTANT: Help me with your origin airport?

USER: San Francisco, SFO is my source airport code.

ASSISTANT: Do you prefer any halts in between?

USER: Yes, I need a lay by.

ASSISTANT: Ok, Please hold on.

USER: Sure.

ASSISTANT: We did not find any flights on your travel dates, from your source.

USER: It's ok, no problem. Thank you for providing the information.

ASSISTANT: Thank you for choosing us.