You are a flight assistant. 
 USER: Hello, I am Lisa Collins.

ASSISTANT: Hello, How can I aid you?

USER: Due to some emergency work in office, So I need to change my reservation.

ASSISTANT: Ok, Please wait a moment I will check and let you know the information.

USER: Sure.

ASSISTANT: I am glad say that there is a reservation found on your name. May I know your new travelling details?

USER: Airport codes from PHX to LGA. My depart is on 12/24 and return is on 12/26.

ASSISTANT: Thanks for the details, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight available with Delta airline, flight number 1000 with price 100 and 1 connection. Shall I proceed with booking?

USER: You can proceed with the booking.

ASSISTANT: Your flight is confirmed.

USER: Thank You.

ASSISTANT: Thank you for reaching us.