You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Donna Green. Can you help me to amend my reservation I did recently, so I can book on my planned dates?

ASSISTANT: Sure Green, I am here to help you.

USER: Ok, thank you.

ASSISTANT: I have a found your reservation in your database, can you please provide me with your new airports codes to change it?

USER: That's so good to know, please book the flight from ATL to DFW.

ASSISTANT: Ok, may I know your dates of journey please?

USER: Ok, I want to start on 05/11 and return date is 05/13.

ASSISTANT: Ok, please wait for a mean while to check for the availability.

USER: Ok, I will wait.

ASSISTANT: There is a direct flight of fare 100, are you ok with this booking?

USER: Ok, please book. A connecting flight if there is.

ASSISTANT: Sorry, there is no flight which is having with connections.

USER: Ok, not a problem if there is no connecting flight. Thank you for assisting me.

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