You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Alexander Adams.

ASSISTANT: How may I aid you today?

USER: Please book me a flight ticket to Los Angeles, CA - LAX from Washington, DC - IAD? Can you help me with a direct flight?

ASSISTANT: Sure, I will check the flights based on your request.

USER: Thank you.

ASSISTANT: Will you send me the travel dates?

USER: I want to start my journey on 02/15, and return on 02/17.

ASSISTANT: Please wait, I will check the flights availability and revert to you.

USER: Ok.

ASSISTANT: Thanks for your time. But we did not find any flight run with direct flight.

USER: Ok, not a problem.

ASSISTANT: Thanks for reaching us.

USER: Thanks for the information.

ASSISTANT: Have a nice day.