You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Samantha Thomas.

ASSISTANT: How can I assist you today?

USER: I want to cancel my reservation, due to sudden postpone of my interview.

ASSISTANT: Ok. Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time. There is no reservation found on your name in our database.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for reaching us.