You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: Can you book me a plane ticket from SFO to IAD?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: I need to reach my destination by Aug 12 as I have an interview next day and will return on Aug 14.

ASSISTANT: May I know your name for further process?

USER: I am Sarah Taylor.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No, I don't have any particular timings.

ASSISTANT: Are you ok with connecting flight or you need a direct flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any another specifications?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Southwest airline flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight?

USER: Actually I was looking for a normal cost airline. Can you please search me another flight?

ASSISTANT: UA airline flight available with connection limit 1 and fare is 200, shall I confirm this economy class flight?

USER: Fine, please proceed with this.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1025.

USER: Thanks for your support.

ASSISTANT: You are welcome Sarah Taylor.