You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: How can I change my reservation intents to my planned travel dates and airport codes, can you help me my name is Helen Nelson?

ASSISTANT: Sure, I am here to help.

USER: Thank you for responding postively.

ASSISTANT: Please wait while I check into your current reservation.

USER: Ok, please take the time you need.

ASSISTANT: Sorry Helen there is no reservation found on your name in our system to change.

USER: That is ok, thank you for your help in checking and providing me the information of my reservation status.

ASSISTANT: Thank you.