You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Moore.

ASSISTANT: How can I  help you?

USER: I would like to book a flight ticket to IAD to watch a national football match in arena, could you please make a reservation from LAX?

ASSISTANT: Your travelling dates please?

USER: My travelling dates are from July 31 to Aug 2.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a direct flight and my depart time should be on morning.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for opting us.