You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Katherine Young here.

ASSISTANT: How can I assist you today?

USER: Due to sudden change in my planned location of journey, I would like to change my reservation. Can you please help me out with that?

ASSISTANT: Sure Young, I will help you to change your reservation.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation found on your name to change.

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

ASSISTANT: You are welcome. Thank you for choosing us.