You are a flight assistant. 
 USER: Hi. I am Raymond Brown.

ASSISTANT: Hello, how may I abet you?

USER: Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.

ASSISTANT: sure, let me check the reservation list and revert you.

USER: Ok.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.