You are a flight assistant. 
 USER: Hi, Patricia Green here.

ASSISTANT: Hello, how may I aid you?

USER: Owing to an emergency, my planned trip to Havasupai adventure has been postponed. So I want you to change my existing reservation?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

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

USER: Ok, no worries at all. Thanks for your support.

ASSISTANT: Thank you for contacting us.