You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Can you please let me know how may I help you?

USER: Unfortunately, I want to change my existing reservation due to some problems, can you please help me in this condition?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Can you please tell me your good name?

USER: Sure, my name is Elizabeth Evans.

ASSISTANT: Ok, I found your reservation. Can you please tell me your trip dates?

USER: Sure, my dates of journey is from 03/24 to 03/26.

ASSISTANT: Ok, which airport codes do you prefer to travel?

USER: Sure, my respective airports codes are from PHX to CLT.

ASSISTANT: Ok, please let me check the availability of flight and then I will get back to you.

USER: Ok, take your time.

ASSISTANT: The AA airlines is found with connection limit 1 and the ticket fare is 100. Shall I proceed?

USER: Ok, you can book it.

ASSISTANT: Ok, your ticket is booked with the flight number 1020.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a safe flight.