You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: My exam is postponed to next month, can you help me to change my reservation to next month?

ASSISTANT: Sure, can I know your name please?

USER: Sure, my name is Joseph Phillips.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for approaching us.