You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I need your help in changing my travel dates in my reservation so can you please help me with that?

ASSISTANT: Sure, on what name your earlier reservation was made?

USER: Thank you for your response, my name is Betty Davis.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found under your name in our list.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.