You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Richard Miller. I want to book a flight ticket on 08/25 and return on 08/27, so can you help me with booking please?

ASSISTANT:  Sure, we are here to make your journey comfort. Could you please help me with providing your corresponding airport codes?

USER: Yes, my airport codes are DC-DCA and TX-AUS.

ASSISTANT: How much you can afford for ticket fare?

USER: I can pay up to 500.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Ok.

ASSISTANT: We have found a UA airline of 1010 flight number with one connection of cost 200.

USER: Please proceed with booking.

ASSISTANT: You can proceed with booking.

USER: Thank you.

ASSISTANT: Thanks for reaching us.