You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can 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: Sure, may I know your name?

USER: Sure, myself Ryan Williams.

ASSISTANT: Please wait a minute, I will check your reservation and get back to you.

USER: Sure, take your time.

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

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

ASSISTANT: Thank you for reaching us.