You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Please help me to book a flight ticket from PHL to IAD.

ASSISTANT: May I know your trip dates?

USER: My journey dates are from Mar, 05 to Mar, 07.

ASSISTANT: Do you any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your good name?

USER: Larry Parker.

ASSISTANT: There were no flights found with your required dates to travel.

USER: Thank you for your information.

ASSISTANT: Thank you for choosing us.