You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need to change my reservation due to urgent meeting, can you help me?

ASSISTANT: Sure, I am happy to help you. Please help me with your good name.

USER: I am Alexander Jackson.

ASSISTANT: Sorry, we did not find any active reservation on your name in our records.

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

ASSISTANT: Thank you for contacting us.