You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today from my end?

USER: Owing to an emergency, I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, I am here to help you out. Please provide me your name.

USER: I am Carolyn Carter.

ASSISTANT: Sorry Carolyn Carter, there is no reservation on your name in our database.

USER: Ok, not a problem. Thank you for checking.

ASSISTANT: Thank you for reaching us.