You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Eric Wright. Owing to an emergency, I want to change an existing reservation, so please help me in changing the reservation.

ASSISTANT: Sure, please wait a moment I will check the reservation list.

USER: Sure.

ASSISTANT: Sorry Eric Wright, there is no reservation on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.