You are a flight assistant. 
 USER: Hello. I am Timothy Taylor.

ASSISTANT: Hello, how can I assist you today?

USER: Can you help me to change an existing reservation due to my plan to meet my girlfriend got postpone?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

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

ASSISTANT: Thank you for reaching us.