You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Owing to an emergency, my meeting with client got postponed, so I want you to change my existing reservation.

ASSISTANT: Sure, may I know your name to proceed?

USER: Sure, Barbara Edwards here.

ASSISTANT: Please wait for a moment to check.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.