You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to book a ticket from DCA to ORD. Can you please help me out to book a flight ticket for me?

ASSISTANT: Sure, May I know the travelling dates?

USER: I would like to travel on July 09 and return back on July 11.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any other requirements?

USER: My return time should be afternoon.

ASSISTANT: May I know your name?

USER: My name is Amanda Walker.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.