You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Anderson.

ASSISTANT: How may I guide you today?

USER: Due to some personal work I would like to change my recent reservation, can you help with this?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Take your own time.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: That's not a issue. Thanks for your help and information.

ASSISTANT: Thank you for reaching us.