You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know your good name?

USER: My name is Betty Gonzalez.

ASSISTANT: How can I assist you for the day?

USER: Can you please change my previous reservation as my exams that I have to attend got postponed?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Give me a moment, I will check your reservation.

USER: Ok, take your time.

ASSISTANT: Thank you for your time, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.