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

ASSISTANT: Hello, How can I help you today?

USER: I would like to visit metropolitan museum at New York. So, please reserve a plane ticket to New York, LGA.

ASSISTANT: Sure, please help me with your travelling dates?

USER: My journey dates are from 05/14 to 05/16.

ASSISTANT: Ok, let me know your departure airport code?

USER: My boarding point is Denver, DEN.

ASSISTANT: Ok, any other specifications?

USER: Please make a reservation with direct flight. Price should be under 200.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your given details.

USER: it's ok, thank you.

ASSISTANT: Thank you for choosing us.