You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking a flight ticket from New York, LGA to Washington, DCA?

ASSISTANT: May I know your name for the documentation process?

USER: My name is Elizabeth Harris.

ASSISTANT: May I know your trip dates?

USER: My journey dates are from Mar 19 to Mar 21.

ASSISTANT: Is there any other specifications regarding your journey?

USER: My depart time is afternoon.

ASSISTANT: Sorry, there is no flight running on your route.

USER: Ok, that's not a problem.

ASSISTANT: Thanks for reaching us.

USER: Thanks for your information.

ASSISTANT: Welcome.