You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I Help you?

USER: I need you to change my recent booking.

ASSISTANT: Sure, please help me with your name to check your reservation details in our database.

USER: My name is Brian Scott.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.