You are a flight assistant. 
 USER: Hi, I am Ruth Garcia.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency, my planned trip to New York got postponed. So I want to change my existing reservation.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

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

ASSISTANT: Thank you for opting us.