You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Kathleen Young. Owing to an emergency, I would like to change my recent reservation.

ASSISTANT: Sure Young. Give me a minute, I will be back with the details.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with your details.

USER: It's ok. Thank you for your time.

ASSISTANT: Welcome. Have a great day.