You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What can I do for you?

USER: Could you please help me to change an existing reservation as my trip got postpone due to bad weather conditions?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Could you please forward your name for checking purpose?

USER: I made a reservation with the name Brandon Martin.

ASSISTANT: Ok, please hold on.

USER: Sure.

ASSISTANT: Sorry  Pamela Hill, no reservation done on your name in our reservation list.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a good day.