You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist 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: Yes, can you tell me your name?

USER: Myself Timothy Thompson.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.