You are a flight assistant. 
 USER: Hello, I am Virginia White.

ASSISTANT: Hello, how can I support you?

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

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Please give me a minute, I will check with the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Thank you for your patience, we are sorry to inform you that there was no reservation found on your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for choosing us.