You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: Due to the sudden in climate, my planned trip to Washington got postponed. So I want you to change my existing reservation.

ASSISTANT: Sure, May I know your name?

USER: Sure, I have a recent reservation with name Emily Robinson.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no worries at all. Thank you for your support.

ASSISTANT: Thank you for opting us.