You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. how can I help you?

USER: My name is Samantha White.

ASSISTANT: Nice to meet you Samantha White.

USER: I want to change my existing reservation, due to an accident. Can you please help me for that?

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

USER: Ok.

ASSISTANT: No reservation found on your name Samantha White. You want to know any thing else from us?

USER: No.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your information.