You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Anna Wright. 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. So, can you help me with it?

ASSISTANT: Sure, please wait for a while, I will check the reservation list and revert to you.

USER: Ok.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: That's ok. Thank you for the response.

ASSISTANT: Thanks for reaching us.