You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I just want to change an existing reservation as my plan to meet my girlfriend got postpone due to my health issues. Can you please help me with this?

ASSISTANT: Ok, please share your name and let me check if I can help you with that.

USER: I am Eric Green.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We didn't find any active reservation in our system on your name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.