You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Mark Nelson. Can you help me in booking a flight ticket from DCA to LGA?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: Thank you. I want to travel on 01/17, and return on 01/19.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the morning time.

ASSISTANT: Ok, wait for some time.

USER: I need a direct flight. Sure.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for approaching us.