You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am John Hernandez. I am planning for a small trip to Atlanta, GA - ATL on 01/27. Can you help me in booking flight ticket?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: Please share me your budget for flight ticket?

USER: 1000 is my budget.

ASSISTANT: Please mention the source point?

USER: Houston, TX - IAH is my source point.

ASSISTANT: May I know when would you like to return?

USER: I would like to return on 01/29.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, Sorry to inform that there is no flight available on given dates.

USER: Ok, no problem in that. Thanks for the response.

ASSISTANT: Thank you for reaching us, have a nice day ahead.