You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Edwards.

ASSISTANT: How may I aid you?

USER: Can you please assist me in booking a flight ticket from PHX to IAD?

ASSISTANT: Can you please share your trip dates?

USER: My trip dates are Mar 29th and Mar 31st.

ASSISTANT: May I know about your departure and arrival times?

USER: The depart time should be evening and arrival time should be afternoon.

ASSISTANT: Do you prefer any connection limit?

USER: Yes, I need a single connection.

ASSISTANT: Sorry to say, no flights found on your way.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.