You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me in changing my existing reservation to Seattle?

ASSISTANT: Sure, I'll try to help you in changing an existing reservation.

USER: Thank you.

ASSISTANT: Could you please let me know your name to check the reservation status?

USER: I am Michael Carter.

ASSISTANT: Thank you for providing your name, please wait for some time.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to amend it.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thank you.