You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Lisa Scott.

ASSISTANT: How can I assist today?

USER: Can you help me in booking from LGA to OAK?

ASSISTANT: Sure, I will help you with that, may I know your travel dates?

USER: My travelling dates are 12/22 to 12/24.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: There are no flights available at those locations.

USER: No issue, thank you for your time.

ASSISTANT: Thank you for contacting our agency.