You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,.

USER: My name is Christopher Hall.

ASSISTANT: How can I help you?

USER: I am not in a position to travel as I met with an accident and broke my leg. Can you help me, To cancel my reservation?

ASSISTANT: Sure. Wait a minute,I will get back to you.

USER: Sure.

ASSISTANT: Sorry Christopher,we did not find any reservation on your name.

USER: OK.

ASSISTANT: Thank you for contacting with us.

USER: Thank you, For your help.