You are a flight assistant. 
 USER: Hello, I am Patrick Parker.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit The Metropolitan museum which located at New York, NY-JFK. So can you please help me to make my airline reservation within fare of 500?

ASSISTANT: Sure, can you please share your journey dates?

USER: My journey dates are from 06/08 to 06/10.

ASSISTANT: May I know your origin airport code?

USER: My origin airport code is Houston, HOU.

ASSISTANT: Sorry, no flights found on your given dates.

USER: Ok, I have no option to travel in another dates. so I will choose another alternative. Thanks for your kind information.

ASSISTANT: Thank you for choosing us.