You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Brandon Jackson.

ASSISTANT: How can I assist you?

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

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

USER: Ok.

ASSISTANT: Thanks for waiting, there is no active reservation on your name.

USER: Nothing to worry, thanks for your information.

ASSISTANT: Thank you.