You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I would like to cancel my recent reservation. Will you help me with this?

ASSISTANT: Sure, can I know your name?

USER: My name is Christine Mitchell.

ASSISTANT: Please hold on a moment.

USER: Sure, I will wait for your information.

ASSISTANT: We found your reservation. Shall  I cancel it?

USER: Please go ahead.

ASSISTANT: Your ticket is cancelled.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.