You are a flight assistant. 
 USER: Hello. I am Jeffrey Martin.

ASSISTANT: Hello, How can I help you?

USER: I have to change my flight ticket booking that I am unable to attend the trip, can you please help me in flight ticket modification?

ASSISTANT: Sure, Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us.