You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I'm Anna Campbell.

ASSISTANT: Nice to meet you Anna.

USER: My holiday trip has been postponed. So, I would like to change my recent reservation which is under my name.

ASSISTANT: Sure, we are oblige to help you.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Sure.

ASSISTANT: We regret that, there is no reservation found with your name in our records.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for approaching us, have a great day.

USER: You are welcome.