You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Jonathan Lopez. I want to book a ticket from PHX to JFK. Could you help me in booking?

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: Could you please help me with your travelling dates?

USER: My travelling dates are from 07/23 to 07/25.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no flights found on your requested travelling dates.

USER: That's ok, no problem.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you.