You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My plan to attend a function got postponed, will you help me to change my existing reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Pamela Harris.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.