You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, how may I help you?

USER: I am Susan Robinson. I want t o change my reservation, can you help in that?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

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

ASSISTANT: Thank you for reaching us, have a nice day.