You are a flight assistant. 
 USER: Hello, myself Donna Nelson.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to change my travel dates to my planned dates as the program which I have planned has been postponed. Can you help me with that please?

ASSISTANT: Sure Nelson, I am here to help you in amending the reservation. Can  you provide me your name? Please I need confirm your name.

USER: I have mentioned above please check.

ASSISTANT: Here I didn't find any active reservation on your name.

USER: That's ok, thank you assisting me.

ASSISTANT: Thank you for reaching us.