You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: As I have done a reservation accidentally last week with wrong airports but I have lot of ways to change my reservation but for a last try with your service. Can you please help in modification of my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you so much.

ASSISTANT: May I know your name?

USER: I have done my previous booking on my name Michelle Clark.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure, I don't mind for waiting. Take your own time.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: It's alright. Thank you for your immediate information about my ticket.

ASSISTANT: Thanks for approaching us.

USER: Welcome.