You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, welcome to flight booking agency. How can I assist you today?

USER: Can you change my flight reservation?

ASSISTANT: Sure, may I know your name to check for the previous reservation in our data base?

USER: Change my flight reservation as my football match which was scheduled in New York has been cancelled. I am Benjamin miller.

ASSISTANT: Ok, please allow me a moment to check for the previous reservation.

USER: Sure.

ASSISTANT: I appreciate your patience. Benjamin, there is no reservation found under your name.

USER: It is ok not a problem. Thanks for your assistance.

ASSISTANT: You are welcome. Thank you for contacting us.