You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

USER: I am Amanda Martin. I am planning to travel from ORD to LAS, help me in booking a flight?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My travelling dates are 02/21 to 02/23.

ASSISTANT: Do you have any specifications?

USER: I want direct flight.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.