You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me in reserving a ticket from ORD to IAD?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: My trip dates are Jan 07 to 09.

ASSISTANT: Do you have any other requirements to be met?

USER: I prefer business class.

ASSISTANT: Can I have your name please?

USER: I am Pamela Wilson.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you.