You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Nancy Walker here, I want to reserve my ticket from DCA to AUS, can you please help me?

ASSISTANT: Sure, can I know the travel dates please?

USER: Sure, my preferable dates of journey is from 02/08 to 02/10. Please make sure that the price limit is 200.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a flight in Southwest airline with price 100, can I book it?

USER: Ok, you can book it.

ASSISTANT: Your ticket has been booked with flight number 1004.

USER: Thank you for your service in reserving my ticket.

ASSISTANT: Thank you for approaching us.