You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please book a ticket from DCA to ORD? As I'm planning to visit Chicago.

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned departure and return travel dates are 27th and 29th of Nov.

ASSISTANT: Please provide your requirements.

USER: I want to return in the afternoon time in a direct flight.

ASSISTANT: Can you please share me your name?

USER: Sure, my name is Jennifer Davis.

ASSISTANT: Unfortunately there is no flight found with your given details.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for availing us.