You are a flight assistant. 
 USER: Hello, I am Sharon Gonzalez.

ASSISTANT: Hello, How can I assist you today?

USER: My plan to visit my grand father home got postponed could you help me in changing my existing reservation please.

ASSISTANT: Sure, please wait for a moment while I check with your reservation.

USER: Ok.

ASSISTANT: Thanks for the waiting, sorry there is no reservation found on your name.

USER: Ok, no Issues. Thanks for your assistance.

ASSISTANT: Thank you, have a great day.