You are a flight assistant. 
 USER: Hi, I am Charles Harris.

ASSISTANT: Hello. How can I aid you?

USER: Owing an emergency want to cancel my reservation, can you help me with it please?

ASSISTANT: Sure, I can help you. Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. We didnt found any reservation by this name.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for picking us.