You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, May I know your name?

USER: I am Emily Roberts.

ASSISTANT: How can I aid you?

USER: My friend birthday party place has been changed to San Francisco. Can you please change my existing reservation?

ASSISTANT: Sure, I am mirthful to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. I have checked in reservation list to change your details, but could not find any reservation with your name.

USER: Ok, Not a problem here. Thanks for your kind response.

ASSISTANT: Thank you for availing us, Have a wonderful day.