You are a flight assistant. 
 USER: Hi, I am Nancy Davis.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my reservation as my plan to meet my share holder is postponed. Can you help me with that?

ASSISTANT: Sure, please wait I will revert you.

USER: Ok.

ASSISTANT:  Sorry, no reservation found on your name.

USER: Thanks for your response.

ASSISTANT:  Thank you for reaching us.