You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I'm searching for a direct flight, can you please help me in booking a ticket?

ASSISTANT: Sure, please tell me your airport codes.

USER: Sure, I want to travel from LAS to LGA locations.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 02/20 and 02/22.

ASSISTANT: Ok, could I know your name please?

USER: Sure, myself Paul Hill.

ASSISTANT: Hill, all flight tickets are sold out in your planned month. DO you have any other dates?

USER: Not at decided, it's ok. Thank you for the information.

ASSISTANT: Thank you for opting us.