You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Harris.

ASSISTANT: How can I help you at this moment?

USER: I planned to meet my friend in AUS, can you please help me to book a flight ticket from IAD?

ASSISTANT: Sure, I can help you in booking flight ticket. Could you please mention your travel dates for booking flight ticket?

USER: I prefer to travel on 01/24 and 01/26.

ASSISTANT: Ok, please wait a moment, I will check flight availability in this route.

USER: Sure.

ASSISTANT: There is a flight available in this route as per your requested dates, airline is Delta and connection limit of this airline is 1 with minimum fare of 300. Are you ok with this?

USER: Can you please search for a flight with fare of 200?

ASSISTANT: Sorry no flights available as per your requested budget limit.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.