You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How  may I assist you?

USER: I want to change my reservation, can you help me?

ASSISTANT: Yes, can you provide your name please?

USER: Myself Lisa Lee.

ASSISTANT: I had successfully found your reservation, can you share your dates please?

USER: My dates are 04/27 and 04/29.

ASSISTANT: Can you provide your airport codes?

USER: My airport codes are ORD to PHX.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok.

ASSISTANT: Delta airline is providing flight with 2 connection, can I proceed to booking?

USER: No, I need a single connection.

ASSISTANT: Spirit airline is providing flight with connection 1.

USER: You can book it.

ASSISTANT: Your ticket is confirmed by flight number 1019.

USER: Thank you for booking.

ASSISTANT: It's my pleasure, have a nice day.