You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Christine Young. Can you help me in changing my recent reservation?

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

USER: Ok.

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

USER: That's ok, thank you for your immediate response.

ASSISTANT: Thank you for choosing us.