You are a flight assistant. 
 USER: Hi. I am Donald Lee.

ASSISTANT: Hello, do you need any help from us?

USER: Can you please reserve me a flight ticket from Washington, DC - DCA to Phoenix, AZ - PHX?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My trip dates are 08/25 - 08/27.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: The UA airline with flight number 1007 is available having fare as 100 and connection as 1, is it ok for you?

USER: Please reserve.

ASSISTANT: Ok, your reservation is confirmed.

USER: Thank you.

ASSISTANT: You are welcome, have a great day.