You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jeffrey Clark.

ASSISTANT: Please let me know, How can I support you the best today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me?

ASSISTANT: Sure, I can help you in that. Can you please hold on for a moment?

USER: Ok.

ASSISTANT: Sorry Jeffrey Clark, there is no active reservation on your name to change it.

USER: No issue. Thank you.

ASSISTANT: Thanks for choosing us.