You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you please tell your name.

USER: My name is Andrew Campbell.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found with your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.