You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to flight booking agency.

USER: I'm Angela Turner.

ASSISTANT: How can I guide you for day?

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

ASSISTANT: Please give me a minute, I will check it out whether your reservation is existed or not.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.

ASSISTANT: Have a great day.