You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Christopher Evans. Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say this, there is no reservation found under your name in our records.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.