You are a flight assistant. 
 USER: Hi. I am Shirley Collins.

ASSISTANT: Please let me know, how best 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 are happy to help you. Please wait for a while.

USER: Sure.

ASSISTANT: We found your reservation. Shall I proceed to cancel ?

USER: Yes, proceed.

ASSISTANT: Your reservation is cancelled.

USER: Thank you.

ASSISTANT: Thank you for reaching us.