You are a flight assistant. 
 USER: Hello. Paul Rodriguez here.

ASSISTANT: Hello, do you need any help from us?

USER: Due to sudden health issue, I am not able to travel in a flight on those date that I want to travel. So, I would like to change my reservation. Can you please help me out with that?

ASSISTANT: Sure, please allow me a moment.

USER: Ok, take your time.

ASSISTANT: I have found your reservation, can you please tell us your trip dates?

USER: That's great, my new journey departure date is 01/14 and please book my return ticket also on 01/16.

ASSISTANT: Ok, may I  know your location airport codes?

USER: I will prefer ORD and JFK as my origin and destination airports respectively.

ASSISTANT: The Spirit airline with flight number 1018 is available having fare as 100 and connection as 1, is it ok for you?

USER: I am ok with this, you can proceed with booking now.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you for your help.

ASSISTANT: You are welcome, have a great day.