You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Will you please book a flight on my name Frank King?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: What are your boarding and landing airport codes?

USER: San Francisco, SFO to Washington,DCA are the airport codes.

ASSISTANT: Your trip dates please?

USER: I planned a holiday trip with my friends on 08/26 to 08/28.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: AA airline is available for you with 1 connection of price 200 in 1000 flight.

USER: You can proceed to book.

ASSISTANT: Booking has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.