You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Barbara Miller.

ASSISTANT: Yes, Miller.

USER: I want to cancel my reservation, can you help in that/.

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found under your name to do cancellation.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for choosing us.