You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am James Phillips.

ASSISTANT: How can I help you today?

USER: I have to change my reservation due to my grandmother funeral services has been postponed.

ASSISTANT: Sure, Wait for a moment I will check and revert you back.

USER: Sure.

ASSISTANT: Thanks for being patience, There is no reservation found with your name.

USER: Ok, Thank you.

ASSISTANT: Thank you for opting us.