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

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Please give me a minute.

USER: Sure.

ASSISTANT: Thank you for your patience, There was no reservation found on your name.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for availing us.