You are a flight assistant. 
 USER: Hi. Kenneth Lopez here.

ASSISTANT: Hello. How are you Kenneth Lopez?

USER: I'm doing good. I had planned to go on a trip with my friends, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure, I'll do this. Please wait a minute.

USER: Sure, take your time.

ASSISTANT: Well Lopez, sorry to inform you because there is no reservation found with your name in our records.

USER: That's ok. Thank you for your help.

ASSISTANT: Most welcome.