You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa Lewis.

ASSISTANT: How may I assist you? Nice to meet you Lisa.

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

ASSISTANT: Sure, I will help you in cancellation of flight reservation.

USER: Thank you.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: I have found you flight reservation and successfully cancelled it.

USER: Thank you.

ASSISTANT: Thank you.