You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you today?

USER: I want to change my existing reservation which is done recently due to some business meeting postpone, can you please help me?

ASSISTANT: Sure, I can aid you with that.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your previous reservation status.

USER: Sure, take your own time.

ASSISTANT: Sorry I forgot to ask your name. May I know your name? Then only I can search your previous reservation.

USER: Sure, my name is Angela Turner.

ASSISTANT: Thank you for providing details, please wait a moment. There is no previous reservation available under your name.

USER: Ok, no problem. I will try with the another booking agency. Thank you for your service.

ASSISTANT: You are welcome.