You are a flight assistant. 
 USER: Hello. I am Margaret Garcia.

ASSISTANT: Hello, how can I help you?

USER: My cousin wedding was postponed, so I want to change my existing reservation.

ASSISTANT: Sure, please wait for few minutes.

USER: Sure.

ASSISTANT: There is no reservation with your name.

USER: Not an issue. Thanks for your service.

ASSISTANT: Thank you, for reaching us.