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: I am here to help you with your concern. Sure, can you please let me know your name to check with the reservation status in our database?

USER: Thank you and myself Barbara Carter.

ASSISTANT: Thank you for sharing your name. Please bear with me for 2-3 minutes.

USER: Sure.

ASSISTANT: Thank you for waiting, Barbara Carter. Your patience is appreciated.

USER: Thank you.

ASSISTANT: Sorry, there is no active reservation found under your name to change.

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

ASSISTANT: Thank you for reaching us. Have a great day!.