You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Owing for an emergency, I have to change my reservation. Can you please help me out?

ASSISTANT: May I know your name please?

USER: My name is Charles Phillips.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: There is no reservation on your name in our database.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for choosing us.