You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: This is Carol Evans. I would like to book a flight ticket from IAD to PHL, will you please assist me in making an airline reservation?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned travel dates are Jan 27th and Jan 29th.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, there are no flights available for your desired dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.