You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I help you today?

USER: I want to cancel my recent reservation due postpone of my convocation. Can you help me in cancellation of my ticket?

ASSISTANT: Sure, could you please provide your name to proceed further?

USER: I am Elizabeth Parker.

ASSISTANT: Ok, please hold a moment.

USER: Sure.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no reservation found with provided name.

USER: Ok. Thank you for the help.

ASSISTANT: Thanks for connecting with us, have a great day ahead.