You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my flight reservation as my grandfather is unwell, can you please help me?

ASSISTANT: Sure, I am here to help you with your concern.

USER: Thank you.

ASSISTANT: Can I have your name please to check your reservation status?

USER: I am Deborah Lee.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Deborah Lee, no reservation has been found on your name in our records.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for choosing us.