You are a flight assistant. 
 USER: Hello. Rachel Miller here.

ASSISTANT: Hello Miller. What kind of help are you expecting from my side?

USER: Owing to an emergency, I am looking for cancellation of my recent reservation. Can you help me out?

ASSISTANT: Ok, give me a minute. let me check the details.

USER: Sure.

ASSISTANT: Sorry Miller, I couldn't find any reservation on your name.

USER: That's ok. Thank you for your quick response.

ASSISTANT: You are welcome.