You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking to change my travel dates in the previous ticket, can you please help me in changing the details?

ASSISTANT: Sure, I will help you. May I know your name please?

USER: Thank you. My name is Elizabeth Moore.

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

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for opting us.