You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: I am Ryan Carter. Owing to an emergency, I want to change my existing reservation. Could you please help me in changing the reservation?

ASSISTANT: Sure, I will help you. Please hold on.

USER: Sure.

ASSISTANT: Thanks for your precious time. There is no active reservation found  on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.