You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How can I aid you today?

USER: I would like to book a ticket to visit a Gerald D. Hines Waterwall Park at Houston, so can you book a ticket within the fare of 1000?

ASSISTANT: Sure, do you need any stop over in between your journey?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: Can I know your journey dates please?

USER: I want to travel on 02/15 and return on 02/17.

ASSISTANT: Kindly assign your airport codes?

USER: I am heading to Houston, HOU from MSP.

ASSISTANT: May I know your name please?

USER: My name is Anna Collins.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Thanks for your time, there were no flights available with your given information.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for contacting us.