You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: My name is Margaret Taylor. Owing to emergency, I need to change my existing reservation. Please help me in changing recent reservation.

ASSISTANT: Sure, wait a minute.

USER: Sure.

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

USER: Not an issue, thanks for your information.

ASSISTANT: Thank you for reaching us.