You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Ok. I need your name to check for earlier reservation. Can you please provide it?

USER: Sure, Emily Moore here.

ASSISTANT: Just a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, I did not find any reservation on your name to change.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.