You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how best I can serve you at this moment?

USER: I was planning to change my holiday location to a cheaper destination within my budget. So, can you please help me with changing my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know on which name the ticket has been reserved?

USER: My reservation was done by the name of Elizabeth Lee.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will be waiting for your reply.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found on your name.

USER: Oh! That's very sad to know for you. Anyways, thank you for checking.

ASSISTANT: Thank you for approaching us.

USER: You are most welcome.