You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Brenda Evans, I want to book a flight to PHX to attend a meeting. Can you book a flight from PHL?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: I will fly on Mar 18 and return on Mar 20th.

ASSISTANT: May I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Please share if you want to travel in any specific time?

USER: I need my return flight in evening.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Brenda Evans, sorry to inform you that non of the airline is providing a flight on your travel dates and locations to book a ticket.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.