You are a flight assistant. 
 USER: Hi, I am David Clark.

ASSISTANT: Hello, how can I help you?

USER: Owing an emergence, I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for reaching us.