You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Andrew Collins. I would like to travel from LGA to SFO.

ASSISTANT: Ok, please help me with your travel dates.

USER: My preferable dates are from 11/11 to 11/13. Please check for direct flights.

ASSISTANT: Sorry Andrew, there are no flights available on your given details.

USER: That's ok. Thank you.

ASSISTANT: You are most welcome.