You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am David Rodriguez. Owing to an emergency, I want to cancel my recent reservation. Can you help me out?

ASSISTANT: Sure, give me a minute. Sorry, there is no reservation found under your name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.