You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Barbara Brown.

ASSISTANT: How may I assist you?

USER: Owing to emergency, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, I will help you. Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your  name to cancel.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.