You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Andrew Anderson.

ASSISTANT: How may I serve 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, we can help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, we did not find any reservation with your name.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.