You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Please book a flight ticket from PHX to EWR.

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: May, 10 and May, 12 are my travel dates.

ASSISTANT: May I know your connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other requirements?

USER: No, thanks.

ASSISTANT: Ok, please let me know your name.

USER: Mary Perez.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.