You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Collins here.

ASSISTANT: How may I help you out?

USER: Can you book a flight ticket for my airport codes that is from PHX to EWR?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: The trip dates are from 09 Feb to 11 Feb.

ASSISTANT: Can I know your specifications in airlines?

USER: I prefer a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry there are no flights found.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.