You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Nicholas Taylor is here. I would like to change my existing reservation, can you please help me with that?

ASSISTANT: Ok, please let me check the reservation records for your flight ticket.

USER: Ok.

ASSISTANT: Ok, thank you for waiting. Sorry, there is no reservation been found on your name to amend.

USER: Ok, no issues at all. Thank you.

ASSISTANT: Ok, thank you for choosing our agency.