You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Gary Martinez. I am planning to enjoy my holidays with my family members at Washington, DCA. Can you please book me a direct flight?

ASSISTANT: Sure, may I know your travelling dates please?

USER: Journey dates are 08/26 to 08/28.

ASSISTANT: Ok, please help me with your source code for further process.

USER: Origin code is Chicago, ORD.

ASSISTANT: Please give me a minute, I will get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say no flights found with your details.

USER: No problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you.