You are a flight assistant. 
 USER: Hello, Jonathan King here.

ASSISTANT: Hello, how may I best serve you today?

USER: I am very happy to got a opportunity to visit NASA space center which will help me to gain more knowledge. So I need help to making my airline reservation.Can you please help me?

ASSISTANT: That's good to here, from where you want to travel to NASA space center?

USER: My journey starts from New York, NY-JFK international airport.

ASSISTANT: On which dates would you like me to book your flight ticket?

USER: 02/09 is my return date and 02/07 is my departure date.

ASSISTANT: How must you can effort for booking a flight ticket?

USER: As my budget is low, I can spend up to 200.

ASSISTANT: Where are you travelling to?

USER: I would like a catch my return flight at MN-MSP.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, sorry to notify that there is no flight found with your requested dates.

USER: That's not a problem, I will go with some other alternative. Thanks for your time.

ASSISTANT: Thanks for approaching us.