You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I want to cancel my recent reservation due to sudden postpone of my trip dates. Can you help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sarah Evans here.

ASSISTANT: I cancelled your reservation successfully under your name.

USER: Ok, thank you for your service.

ASSISTANT: Thank you for reaching us.