You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Moore.

ASSISTANT: Moore,How can I help you?

USER: I want to book a ticket from MSP to LAX.Can you please help me?

ASSISTANT: sure, please mention your travelling dates?

USER: My travelling dates are 11/27 and 11/29.

ASSISTANT: Ok, wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flights for your requirements.

USER: Ok, that's fine. Thank you for your time.