You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

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

ASSISTANT: Sure, I will help you with that. Can I have your travel dates please?

USER: My preferable journey dates are from 05/20 to 05/22.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: May I know your good name please for documentation purpose?

USER: My name is Michelle Harris.

ASSISTANT: Ok, thank you for choosing us.

USER: Thank you for providing information.