You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I would like to travel from LAS to IAD, can you help me with that?

ASSISTANT: Sure, I will help you in booking a flight ticket. Can you please share your trip dates?

USER: My trip dates are 12/08 and 12/10.

ASSISTANT: Do you have any connection limit preference?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: My depart time must be in morning.

ASSISTANT: May I know your name to proceed further?

USER: I am Laura Davis.

ASSISTANT: Laura Davis, regret to inform that there is no flight available which departs in the morning.

USER: That's ok. Thank you for your service.

ASSISTANT: Thank you for connecting us.