You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello.

USER: I am Amanda Davis.

ASSISTANT: How may I assist you?

USER: Please, book me a plane to Atlanta, ATL to attend food festival.

ASSISTANT: Sure, may I know your origin airport code?

USER: Thank you. My origin airport is Houston, IAH.

ASSISTANT: On which dates would you like to travel from ATL to IAH?

USER: I would like to travel on 09/16.

ASSISTANT: Could you please share me your return date?

USER: I will return on 09/18.

ASSISTANT: How much you can afford for this ticket?

USER: 200 is the budget.

ASSISTANT: We are sorry to say that there is no flight on your details.

USER: Ok, I will choose other airline.

ASSISTANT: Thank you so much.

USER: Thank you.