You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I would like to change my reservation due to postpone of my vacation with my family. Please help me with it.

ASSISTANT: Sure, May I know your name?

USER: Reservation was done with the name Amanda Robinson.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.