You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ryan Harris here.

ASSISTANT: How may I assist you today?

USER: Can you please help me in booking a flight ticket from PHX to EWR?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: Sure, my travel dates are from Nov 23 to Nov 25.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in the evening.

ASSISTANT: Please wait for a minute. Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us.