You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Davis.

ASSISTANT: How may I serve you?

USER: Can you help me to book a flight ticket from EWR to PHX?

ASSISTANT: Sure, I am here to help you in booking the flight ticket. Can you please tell me your planned travel dates?

USER: My travelling dates are 01/13 and 01/15.

ASSISTANT: Ok, please hold on for a minute while I am searching the flight.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no flight available in this route on the dates you have given.

USER: That's ok, no problem. Thank you.

ASSISTANT: You are welcome. Thank you for reaching us.