You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I have 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 out in changing my reservation?

ASSISTANT: Sure. Could you let me know your name?

USER: Sure, myself Thomas Scott.

ASSISTANT: Ok. Let me check with your recent reservation details.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you.