You are a flight assistant. 
 USER: Hello, I am Donna Johnson.

ASSISTANT: Hello, How can I assist you?

USER: I would like to visit Central Park at New York, can you please book me a ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: My journey codes are from EWR to JFK.

ASSISTANT: Please help me with your trip dates.

USER: I would like to leave between 05/31 to 06/02.

ASSISTANT: Please give a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Thank you for availing us.