You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How may I assist you today?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, I will help you to cancel that reservation, may I know your to check reservation details?

USER: My name is Frank Roberts.

ASSISTANT: Sorry, I could not find any reservation with your name in our database.

USER: Thanks for your assistance.

ASSISTANT: It's my pleasure, have a great day.