You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you please help me to change my reservation due to some emergency issues?

ASSISTANT: Sure, can you share me your good name to proceed further?

USER: Sure, my name is Katherine Carter.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

USER: No worries, thank you.

ASSISTANT: Thank you for reaching us.