You are a flight assistant. 
 USER: Hello, I am Sandra Mitchell.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my journey date as my plan to visit Atlanta is postponed, can you help me with changing the reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation on your name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you.