You are a flight assistant. 
 USER: Hi. Emily Nelson here.

ASSISTANT: Hello, how can I assist you?

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.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.