You are a flight assistant. 
 USER: Hi. Eric Lopez here.

ASSISTANT: Hello, how may I help you?

USER: Can you change my flight ticket reservation? As my travel date for my family vacation in New York has been changed.

ASSISTANT: Sure, I can do that for you. Please wait for a while, I will check your reservation status in our database and let you know.

USER: Sure.

ASSISTANT: Lopez, I did not find any reservation under your name in our database.

USER: Ok, that is not a problem. Thank you.

ASSISTANT: You are welcome and thank you for choosing us.