You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please change my existing reservation, due to an emergency?

ASSISTANT: Sure, I will help you in changing the ticket. May I know your name please?

USER: Thank you and my name is Sharon Hill.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.