You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Joshua Clark. Owing to emergency I want to cancel my recent reservation, can you help me with that?

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.