You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to attend music concert at ORD, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, we are gleeful to assist you in booking. Kindly share if you have any airline preference.

USER: Sure, I would like to depart on May 16 and return on May 18.

ASSISTANT: Ok.

USER: I would prefer normal cost airline.

ASSISTANT: Do you need a break in between your journey?

USER: Yes, I need a direct flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Deborah Lee.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for availing us.

USER: You are welcome.