You are a flight assistant. 
 USER: Hi, I am Rachel Williams.

ASSISTANT: Hello, how may I assist you?

USER: I just want to change an existing reservation due to my plan to meet my grand parents got postpone. Can you help me with this?

ASSISTANT: Ok, please wait I will check the reservation on your name and get back to you.

USER: Ok.

ASSISTANT: We found a reservation on your name. Please share your airport codes to change the reservation?

USER: My updated airport codes are from Boston, MA-BOS to Phoenix, AZ-PHX.

ASSISTANT: Ok, please ensure the dates of your travel?

USER: 12/23 and 12/25 are my planned travelling dates.

ASSISTANT: Ok, please wait for a moment. OK, do you have a connection limit?

USER: Ok. I need a connection.

ASSISTANT: We found spirit airline with flight number 1002. Price 100 with a single connection.

USER: Ok, you can proceed with this airline.

ASSISTANT: Shall I reserve your ticket? Ok. Your ticket has been confirmed.

USER: Thanks for your kind support.

ASSISTANT: Thank you for reaching us.