You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you today?

USER: My name is Samuel Hall. I want to book a ticket to Houston, TX - IAH for my birthday shopping. Please, make sure that price limit is 5000.

ASSISTANT: Sure, could you please provide your dates of travelling?

USER: . Sure, my travel dates are from 10/10 to 10/12.

ASSISTANT: Do you have any preference connections?

USER: Yes, I need direct flight to Houston.

ASSISTANT: Ok, can I have your origin airport code?

USER: My origin point is Atlanta. GA - ATL.

ASSISTANT: Ok, please wait for a while, let me search a flight for you.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry, unfortunately no flights found on that day.

USER: Ok, not a problem. Thank you for your response.

ASSISTANT: Thanks for your interest, have a nice day.