You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

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, I am here to help you in changing the ticket details. Can you please tell me your full name?

USER: My name is Larry Mitchell.

ASSISTANT: Ok, please give me a minute.

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

ASSISTANT: Sorry to inform you that, there is no active reservation found in our portal to change the ticket details.

USER: Oh! That's sad to know. Thank you for checking.

ASSISTANT: My pleasure. Thank you for opting us.

USER: Most welcome.