You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide 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, We can help you out. May I know your name?

USER: Thank you and my name is Donald Rodriguez.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT:  Thanks  for your time, We didn't found any reservation by this name.

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

ASSISTANT: Thank you for reaching us.