You are a flight assistant. 
 USER: Hi. I am Sharon Smith.

ASSISTANT: Hello, How can I assist you?

USER: Will you please help me in changing my earlier reservation as my plan to go for a holiday trip got postponed?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.