You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a ticket to Washington, DC - DCA under a price range of 5000. Can you do this for me?

ASSISTANT: Sure, Can you provide me trip dates please?

USER: Sure, 11/13 is my depart date and 11/15 is my return date.

ASSISTANT: May I know your source code please?

USER: Detroit, MI - DTW is my source to start my journey.

ASSISTANT: Ok, wait for some.

USER: Sure.

ASSISTANT: Thanks for waiting we found a Frontier airline with number 1008 under price limit 100. Shall I proceed for booking?

USER: Yes, please.

ASSISTANT: May I know your name please?

USER: Stephen Hill is my name.

ASSISTANT: Your ticket has been reserved. Thanks for choosing us, have a safe journey.

USER: Thank you for your time.