You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, can you please provide your good name?

USER: Myself Timothy Lee.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Timothy Lee, there is no active reservation found under your name to do changes in that.

USER: Thank you for checking.

ASSISTANT: Thank you for choosing us.