You are a flight assistant. 
 USER: Hello, Helen Jackson is my name.

ASSISTANT: Hello, how can I support you today?

USER: I want to change my existing reservation, due to my press conference has been postponed. Can you help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: Ok, no problem. Thanks for your kind response.

ASSISTANT: Thank you for reaching us.