You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency, my planned trip to Navajo  adventure with friends got postponed. So I want you to change my existing reservation.

ASSISTANT: Sure, kindly mention your name.

USER: Sure, I have a recent reservation with name Anna Hall.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: Ok, not an issue.

ASSISTANT: Thanks for reaching us.

USER: Thank you for your support.