You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Brandon Parker.

ASSISTANT: Yes Parker.

USER: Can you please modify my recent ticket details? Because I am unable to travel on those dates.

ASSISTANT: Sure, I am here to help you in that, please hold on for a moment to check your reservation status.

USER: Ok, take your time.

ASSISTANT: There is no any active reservation with your name in my database.

USER: It's ok, thank you for searching.

ASSISTANT: It's my pleasure.