You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to change my reservation, will you help me with that?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: Myself Nancy Garcia.

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

USER: Ok, I will wait.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for approaching us.