You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Can you please help me to book a ticket from LAX to LGA?

ASSISTANT: Sure, to book a ticket may I know your planned travel dates?

USER: My travelling dates are on Mar 04 and Mar 06.

ASSISTANT: Do you have any other requirements?

USER: I need to depart in the evening time.

ASSISTANT: Can you please share me your name?

USER: I am Ashley Roberts.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: Ok, not a problem. Thank you for informing me.

ASSISTANT: Thank you for opting us.