You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Jacob Thomas. As my exam is postponed, I want to change my reservation. Can you help me?

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: Sorry Jacob, I could not find any reservation on your name.

USER: No issue, thank you for checking.

ASSISTANT: You are welcome.