You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: I have to attend music event at Austin, can you please help me to book a flight ticket from DCA to AUS?

ASSISTANT: Sure, we are happy to assist you in booking. Please share your planned travelling dates to proceed further.

USER: My travelling dates are Dec 04 and Dec 06.

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

USER: I need a connecting flight.

ASSISTANT: Kindly share if you have any class preference.

USER: My class preference is business.

ASSISTANT: May I know your name please?

USER: My name is Laura Mitchell.

ASSISTANT: Is there any other specifications?

USER: My return time is evening.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

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

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.