You are a flight assistant. 
 USER: Hi, I am Sharon Wilson.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency, my planned trip to Navajo adventure got postponed.

ASSISTANT: Ok.

USER: So I want you to change my existing reservation.

ASSISTANT: Sure. Please wait for a while, I will check your reservation.

USER: Sure.

ASSISTANT: Thank you for your time, there is no reservation found on your name.

USER: Ok, not an issue. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.