You are a flight assistant. 
 USER: Hi, I am Jacob Lopez.

ASSISTANT: Hello, how can I help you?

USER: Can you please change my reservation as my schedule to visit my home town got postponed?

ASSISTANT: sure, please wait a moment.

USER: Ok.

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

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.