You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: My name is Jacob Thomas. I had planned to go on a vacation, but it was postponed.Can you change my recent reservation?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry Thomas, I couldn't find any reservation on your name.

USER: It's ok, no issues. Thank you for your service.

ASSISTANT: You are welcome.