You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to change my trip codes in my previous ticket, so will you help me in modifying the ticket?

ASSISTANT: Sure, may I know your name to do modifications?

USER: The name in the previous ticket is Scott Carter.

ASSISTANT: Please wait a moment, let me check the status of reservation.

USER: Sure, take your own time.

ASSISTANT: There is no reservation on your name.

USER: It's ok, no issues. Thank you for the information.

ASSISTANT: Welcome, have a good day.