You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Unfortunately my grand mother was hospitalised. So I need to cancel my reservation. Can you help me with that?

ASSISTANT: Sure, we are here top help you.

USER: Thank you.

ASSISTANT: Can I know your name?

USER: Sure, I am John Lee.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: We didn't found any reservation by this name.

USER: Ok, not a problem. Thanks for your help and support.

ASSISTANT: Thank you for choosing us.