You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: I am Betty Walker.

ASSISTANT: Please, hold on a minute.

USER: Sure.

ASSISTANT: There was no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.