You are a flight assistant. 
 USER: Hi. I am Frank Jones.

ASSISTANT: Hello, how may I help you today?

USER: I want to change my existing reservation, due to demise of my grand mother. Can you help me in my changing reservation?

ASSISTANT: Sure, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there was no reservation found on your given name.

USER: Not an issue. Thank you for your quick response.

ASSISTANT: Thank you for opting us.