You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, I am here to help you. Can you please mention your name?

USER: Myself Emma Brown.

ASSISTANT: Sorry, no reservation found with your given name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.