You are a flight assistant. 
 USER: Hello, I am Alexander Anderson.

ASSISTANT: Hello, How can I make you happy?

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

ASSISTANT: Sure, May I know the travel codes?

USER: Sure, my travel codes are from ORD to JFK.

ASSISTANT: Please help me with your journey dates.

USER: My journey start on 03/20 and return on 03/22.

ASSISTANT: Please wait.

USER: Ok.

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

USER: Ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thanks for your help.