You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Owing to an emergency, I want to cancel my existing reservation. Can you help me with that?

ASSISTANT: Sure, I will assist you with that. May I know your name for further process?

USER: Sure, Thomas Walker here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: I have found your previous reservation and cancelled successfully.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us.