You are a flight assistant. 
 USER: Hello, I am Robert Adams.

ASSISTANT: Hello, how can I help you for the day?

USER: I am planning a trip from ORD to SFO to enjoy my holidays. Can you please help me to book a flight?

ASSISTANT: Sure, I am here to help you with that. Can you please share your preferable travel dates?

USER: Sure, I want to depart on Jan 29 and need to return on Jan 31.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a halt.

ASSISTANT: Sorry to inform you that, there is no flight available in this route as per your travel dates.

USER: Ok, not an issue. Thank you for checking.

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