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 got postponed. So I want you to change my existing reservation.

ASSISTANT: Sure, may I know your name?

USER: Sure, Barbara Parker here.

ASSISTANT: Please wait a moment.

USER: Sure.

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

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Thanks for reaching us.