You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I have done my reservation last week for my exams in Boston city but due to some technical issue in that university they have changed my exam destination to Phoenix. Can you please help me to change my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for considering my request.

ASSISTANT: Ok, May I know your name?

USER: Sure, my name is Christine Clark.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your patience, There was no reservation found on your given name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us.