You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Jones.

ASSISTANT: How may I guide you?

USER: I am planning a trip to Las Vegas, can you please book me a ticket from LAX to LAS?

ASSISTANT: Sure, please provide me your trip dates.

USER: My preferable journey dates are from 03/29 to 03/31.

ASSISTANT: There are no flights available at this moment, Jason.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.