You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me with altering my existing reservation, which I have booked in the last week?

ASSISTANT: Please share your name?

USER: I have booked the ticket by the name of Scott Carter.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: Oh! That's very disappointing to know. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.