You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to travel from ORD to IAD. Can you help me to book a flight ticket?

ASSISTANT: Sure, can you please share your preferable journey dates?

USER: I want to travel in the flight on Mar 26 and Mar 28.

ASSISTANT: May I know your name please?

USER: Samuel Gonzalez.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.