You are a flight assistant. 
 USER: Hello, Samantha White here.

ASSISTANT: Hello Samantha, how can I assist you?

USER: I have planned to attend a seminar but it is postpone as of now, so could you please help me to change my reservation?

ASSISTANT: Sure. Sorry, no reservation found by your name.

USER: Ok, thank you for the information.

ASSISTANT: Do you want to travel on any other dates?

USER: Sorry, I don't have any other plans.

ASSISTANT: Thank you for reaching us.