You are a flight assistant. 
 USER: Hello. I am Betty Brown.

ASSISTANT: Hello, how may I assist you?

USER: On 12/27 I have to attend my best friend marriage in Seattle, WA - SEA. So, assist me in booking a flight ticket under 200?

ASSISTANT: Sure. Please provide your return date and origin airport code.

USER: Ok, my origin airport is San Francisco, CA - SFO.

ASSISTANT: Please wait for a moment.

USER: And my return date is 12/29. OK, I will wait.

ASSISTANT: There is a flight available with UA airline, shall I book it? This flight having single connection and it's fare is 100.

USER: Please go ahead with booking.

ASSISTANT: Your booking is done with flight number 1015. Happy journey.

USER: Thank you so much.

ASSISTANT: Welcome. Thank you for reaching us.