You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Linda Baker, owing to an emergency I want to change my existing reservation.

ASSISTANT: Ok, please wait a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for being wait. Unfortunately there is no reservation found against your name.

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

ASSISTANT: Thank you and have a nice day.