You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you today?

USER: Can you please cancel my reservation as my plan to go for shopping got postponed?

ASSISTANT: Sure, we are gleeful to help you in cancellation. May I know your name please?

USER: I am Christine Mitchell.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry we couldn't find any reservation against your name.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for opting us. Have a great day.