You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I want to change my recent reservation. Can you help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Stephen Scott.

ASSISTANT: Please wait for a minute.

USER: Ok, take your time.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.