You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know your name?

USER: My name is Thomas Miller.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, we found a reservation on your name and cancelled it successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.