You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Frank Perez. 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 please?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: We did not find any reservation with your name.

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

ASSISTANT: Have a nice day.