You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: I want to attend a business meeting at LGA, can you please book me a flight ticket from DCA?

ASSISTANT: Sure, let me know your planned journey dates?

USER: My planned journey dates are from Jan 13th to Jan 15th.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I prefer a direct flight to travel.

ASSISTANT: Is there any other specifications?

USER: I want to travel in major airlines.

ASSISTANT: May I know your good name?

USER: I am Jessica Johnson.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey routes.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.