You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Please book a ticket from LGA to SFO to go for Sports event.

ASSISTANT: Sure, can I know your good name please?

USER: I am Scott Harris.

ASSISTANT:  When you are willing to travel?

USER: My journey dates are Aug 11 and Aug 13.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I want a direct flight.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.