You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: Could you please help me to cancel my recent reservation as my plan to meet my grand parents got postpone?

ASSISTANT: Sure. May I know your name?

USER: My name is Dennis Walker.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: We didn't found any reservation by this name.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.