You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Michelle Allen. 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, please wait a moment I will check and proceed further.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: No issue. Thank you for your help.

ASSISTANT: Welcome.