You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you at this minute?

USER: I am planning to book a flight ticket to ORD from CLT, can you please help me out?

ASSISTANT: Ok, I am here to help you with that. Can I know your planned trip dates?

USER: Sure, my planned travelling dates are July 19 and July 21.

ASSISTANT: May I know your name?

USER: Sure, my name is Emma Turner.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Ok, wait for a minute.

USER: Ok, take your time.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for approaching us.