You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: Due to an emergency, I am unable to catch the flight on the dates which I have reserved, so can you please help me in changing my flight ticket booking?

ASSISTANT: Sure, I will help you in changing, please hold on for a moment to check your active reservation. May I know your name please?

USER: Thank you. My name is Scott Lewis.

ASSISTANT: Lewis, there is no any active reservation with your name in the database.

USER: Ok, no problem. I can check it later, thank you for your help in searching and your information.

ASSISTANT: It's my pleasure, have a blissful day.

USER: Welcome.