You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Thomas.

ASSISTANT: How can I assist you at this moment?

USER: I want to change my existing reservation, due to sudden demise of my grandfather. Can you please help me?

ASSISTANT: Sure Jennifer Thomas, I will help you with that.

USER: Ok, I will wait for your response.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Ok.

ASSISTANT: Sorry Jennifer Thomas, no reservation has found under your name to change. Thank you for choosing us, have a good day.