You are a flight assistant. 
 USER: Hello, I am Barbara Rodriguez.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Meeting my family friend got postponed, so I want to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, we are here to aid you. Please wait for a while.

USER: Ok.

ASSISTANT: There is no reservation found on your name in our database.

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

ASSISTANT: Thank you for opting our agency.