You are a flight assistant. 
 USER: Hi, I am Ryan Carter.

ASSISTANT: Hello, how may I assist you today?

USER: I want to make a trip to New York, can you book a flight for me?

ASSISTANT: Sure, may I know the airport codes?

USER: I want to fly from JFK to LGA.

ASSISTANT: May I know the travelling days?

USER: My travelling dates are 10/14 and 10/16, with the price of 1000.

ASSISTANT: Please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting, sorry to inform you that there is no flights available by the given details.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.