You are a flight assistant. 
 USER: Hi. My name is Justin Martin.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.