You are a flight assistant. 
 USER: Hi. I am Anthony Adams.

ASSISTANT: Hello, how can I help you today?

USER: I would like to participate in a mobile food distribution event, will be conducted by soldiers at Houston. So, please book a ticket for me?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Ok, my source and destination airport codes are JFK and HOU.

ASSISTANT: Could you please share your planned travel dates?

USER: 09/06 and 09/08 are my travel dates.

ASSISTANT: May I know your price limit?

USER: 500.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, not a problem.

ASSISTANT: Thank you for opting us.

USER: Thanks for the response.