You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to change my existing reservation, can you please help me with that?

ASSISTANT: Sure, I am here to help you. May I know your name to check with the status?

USER: Sharon Wright is here.

ASSISTANT: Please wait a moment while I check with the status.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, there is no active reservation found under your name to amend.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching our agency.