You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

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

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Jacob Adams.

ASSISTANT: Wait a moment please.

USER: Sure, take your own time.

ASSISTANT: Jacob Adams, we haven't found any reservation under your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.