You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to change my reservation, due to some problems I am unable to travel those dates so can you please change my reservation?

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

USER: Thank you.

ASSISTANT: Can I have your name please for checking your reservation status?

USER: Sure, my name is Brian Evans.

ASSISTANT: Ok, please wait a moment to check reservation status.

USER: Ok.

ASSISTANT: Yes, I have found your reservation so please let me know your new travel dates.

USER: Oh! That's great, I want to take off on 08/24 and also confirm my return ticket too on 08/26.

ASSISTANT: May I know the airport codes of your journey locations?

USER: I want to fly from EWR and destination airport is DEN.

ASSISTANT: Yes, I have found a flight in Frontier airlines with connection 1 and price 200, is it ok for you?

USER: I am ok with this airline, please proceed.

ASSISTANT: Ok Brian Evans, I have confirmed a ticket with flight number 1016.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us, have a great journey.