You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Elizabeth Thompson here.

ASSISTANT: How can I aid you at this moment?

USER: I want to do some modification in my previous flight ticket booking that there is a sudden event held at my home town, so I am unable to travel the trip. can you please help me?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: Please hold on a moment, I will check your reservation status.

USER: Ok, take your time.

ASSISTANT: There is no previous reservation found in your name Elizabeth Thompson.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.