You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Carol Hernandez.

ASSISTANT: How may I help you?

USER: Can you help me in changing my recent reservation, as my interview is postponed?

ASSISTANT: Sure, wait for a while.

USER: Ok.

ASSISTANT: Sorry, there are no reservation found on your name?

USER: That's ok, thank you.

ASSISTANT: Thank you for consulting us.