You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to travel from DCA to IAD, can you help me in doing that?

ASSISTANT: Sure, may I know your good name?

USER: Gregory Martin here.

ASSISTANT: Do you prefer a connecting or direct flight?

USER: I need a connecting flight.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My journey dates are Jan 09 to 11.

ASSISTANT: Are there any more specifications?

USER: Please ensure that my depart time is afternoon.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.