You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Matthew Roberts here.

ASSISTANT: Welcome to flight booking agency Roberts.

USER: I want to change my reservation, due to some health issue. Can you please help me?

ASSISTANT: Sure, I will help you.

USER: Ok.

ASSISTANT: Please wait a moment to check your previous reservation status.

USER: Ok, take your time.

ASSISTANT: I have found your reservation. Can you please provide your new journey airport codes for booking?

USER: Sure, my new airport codes are from LGA to ATL.

ASSISTANT: Ok, may I know your preferable dates of travelling?

USER: My travelling dates are from 12/12 till 12/14.

ASSISTANT: Ok, please wait a moment to check the flights and I will revert back to you.

USER: Ok.

ASSISTANT: Based on your information, I have found a flight with 1 connection with the fare of 100. Is it ok for you?

USER: Please proceed.

ASSISTANT: Ok, your reservation is done successfully with flight number 1019.

USER: Thank you for booking.

ASSISTANT: Thank you for approaching us, take care of your health.