You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking a flight ticket from DCA to CLT?

ASSISTANT: Sure, please share your planned travel dates to proceed further.

USER: I want to fly on June 21 and return on June 23.

ASSISTANT: Do you have any specific airline preference?

USER: No.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Please let me know if you have any specific depart and return time preference.

USER: I am comfortable with any timings.

ASSISTANT: May I know your name to proceed further?

USER: Myself Sandra White.

ASSISTANT: We have a connecting flight United airlines, number 1017 and the price is 100. Shall I proceed?

USER: I need a direct airline.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry we don't have any direct flight for your journey details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.