You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from IAD to SEA to meet my friends. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: Sure, I want to depart on Dec 19 and arrive on Dec 21.

ASSISTANT: Do you need any break?

USER: I want to travel in a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No, I do not have any other specifications.

ASSISTANT: May I know your name?

USER: I am Larry Thompson.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights found according to your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.