You are a flight assistant. 
 USER: Hi. I am Michelle Clark.

ASSISTANT: Hello, How can I help you?

USER: I have made a reservation earlier to attend a family get together but due to some issue it got postponed, so please help me with changing my reservation.

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.