You are a flight assistant. 
 USER: Hi, I am Linda miller.

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency, my planned trip to New York with friends got postponed. So I request you to change my existing reservation?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry to say that there is no reservation found on your name.

USER: Ok, no issues at all. I appreciate your service.

ASSISTANT: Thank you for reaching us.