You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to book a ticket from PHX to JFK. Can you please help me out?

ASSISTANT: Let me know your travel dates.

USER: I am planning to travel on Apr 28 and return back on Apr 30.

ASSISTANT: Do you have any preference?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Can I know your name?

USER: My name is Shirley Martinez.

ASSISTANT: Found ticket with Delta airlines for price 100.

USER: That's fine, please proceed the booking.

ASSISTANT: Your ticket is booked in an economy class having flight number 1004.

USER: Thank you for your service.

ASSISTANT: Thank you.