You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from IAD to ORD, can you help me out?

ASSISTANT: Can you please provide your planned travel dates?

USER: My trip dates are from Jul 8th till Jul 10th.

ASSISTANT: May I know in which class do you prefer to travel?

USER: I am ok with any class.

ASSISTANT: Please let me know if you have any other specifications.

USER: No, thanks.

ASSISTANT: Can I have your good name please?

USER: Myself Jacob Martin.

ASSISTANT: Sorry there are no flights available on those dates.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.