You are a flight assistant. 
 USER: Hi. I am Edward Baker.

ASSISTANT: Hello, how may I help you today?

USER: I would like to change my existing reservation, can you please help in changing?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, no active reservation was found on your name in the database.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for opting us.