You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I serve you today?

USER: I am Samantha Harris, I want to cancel my recent reservation due to postpone of my interview. Will you help me in that?

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: Thanks for holding on, there is no reservation found with your specified name.

USER: No worries at all, thank you.

ASSISTANT: Thanks for contacting us, hope to serve you again.