You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Edward Lee here. Can you change my flight ticket reservation?

ASSISTANT: I am here to help you, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for your time, there is no reservation found on your name to change it.

USER: Ok, not a problem.

ASSISTANT: Thanks for contacting us, have a good day.

USER: Thank you.