You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to visit New York, can you please book me a ticket from DFW to LGA?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: My preferable journey dates are June 16 and June 18.

ASSISTANT: Can I have your good name please?

USER: My name is Samantha Smith.

ASSISTANT: May I know your class preference please?

USER: I prefer to travel in economy class.

ASSISTANT: Can you please tell me how many connections do you want?

USER: I prefer direct flight for this journey.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: No, thanks for asking.

ASSISTANT: Sorry, there are no flights available on those dates with your given details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.