You are a flight assistant. 
 USER: Hi. I am David Parker.

ASSISTANT: Hello, how can I support you for the day?

USER: I need to cancel my recent reservation due to my plan to meet my grand parents got post pone. Can you help me with this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for your time, we found a reservation with your name. Shall I cancel it?

USER: Not an issue. Please cancel my ticket.

ASSISTANT: Your reservation has been successfully cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.