You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to an emergency, I want to change my reservation.

ASSISTANT: Ok.

USER: Can you help me?

ASSISTANT: Sure, I will help you. Please, provide your name.

USER: I am Carolyn Campbell.

ASSISTANT: Give me a minute to check the reservation on your name.

USER: Ok.

ASSISTANT: Thanks for your time. I am sorry to inform you that, there is no reservation found on your name.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for approaching us.