You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may 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 glad to help you. Can you please provide your name to check your previous reservation?

USER: Thanks, my name is Pamela Thomas.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Yes, I have found your reservation. Can you please provide your preferable dates of travelling?

USER: Oh! That's great. I want to take off on 10/26 and also confirm my return ticket too on 10/28.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I want to fly from ATL and destination airport is DTW.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Please make sure that I want a direct flight to Detroit.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with connection 0.

USER: Oh! It's ok no problem, I will go with another airline service. Thank you for your information.

ASSISTANT: Thank you for approaching us, have a great day.