You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Please help me to book a ticket from DCA to ORD to attend Sports festival.

ASSISTANT: May I know your journey dates?

USER: My travelling dates are June 24 and June 26.

ASSISTANT: Is there any connection limit?

USER: No.

ASSISTANT: Any other requirements you have?

USER: I prefer business class.

ASSISTANT: May I know your name?

USER: I am Rachel Mitchell.

ASSISTANT: There were no flights running currently with your specified dates to travel.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.