You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to sudden change in my planned dates of journey, I would like to change my reservation. Can you please help me out with changing of my recent reservation?

ASSISTANT: Sure, I can do that for you. Please wait, let me check your reservation status in our database. May I know your name?

USER: Thank you for accepting my request and my name is Brenda Williams.

ASSISTANT: Thank you, please wait for a while.

USER: Sure, I can wait.

ASSISTANT: Brenda Williams, there is no reservation found under your name in our database.

USER: Not an issues with that one, thank you for checking my reservation and providing the information.

ASSISTANT: You are welcome and have a nice day.