You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I am Dorothy Jones, I want to change my reservation as my plan to meet my family member is postponed. Can you change my journey dates?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation found on your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.