You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

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

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: Sure, Patricia Gonzalez here.

ASSISTANT: Sorry, there are no reservations found.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your assistance.