You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Michelle Collins here.

ASSISTANT: How can I help you?

USER: Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Thank you for  waiting for us,  can you please share your airport codes ?

USER: My airport codes are from PHX to JFK.

ASSISTANT: Ok, can I know your travelling dates for booking?

USER: My travelling dates are from 11/27 to 11/29.

ASSISTANT: There is a flight in Spirit airline with connection limit 1 and with fare of 200. Would you like to book this flight?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Ok, your booking is confirmed with flight 1000.

USER: Thanks for helping me.

ASSISTANT: Thank you for reaching us, have a safe journey.