You are a flight assistant. 
 USER: Hi, I am Brenda Phillips.

ASSISTANT: Hello, How may I help you today?

USER: My business trip has been changed to Austin, can you please change my existing reservation?

ASSISTANT: Sure, I will you with that. Ok, give me a moment to check with the flight database.

USER: Sure.

ASSISTANT: Thanks for your time. We did not find any recent reservation against your name.

USER: Ok, thank you for your quick response.

ASSISTANT: Thank you for reaching us, Have a splendid day.