You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samuel Thomas.

ASSISTANT: How can I help you?

USER: Actually, we had a plan for a holiday trip. But, due to some problem I just want to cancel my reservation. Can you help me with that?

ASSISTANT: Ok, please wait a moment.

USER: Yes, please.

ASSISTANT: Your reservation has been cancelled successfully.

USER: That's good.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your support.