You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you today?

USER: I am planning to visit Detroit to meet my friend, can you please book me a ticket from IAD to DTW?

ASSISTANT: Sure, May I know your travelling dates?

USER: My preferable journey dates are from Aug 02 to Aug 04.

ASSISTANT: Do you have any preferences?

USER: My budget for this trip is limited to 500, can you please search for a ticket fare under this?

ASSISTANT: May I know your good name?

USER: My name is Sarah Phillips.

ASSISTANT: You have a flight 1020 in JetBlue airline and price 100 with a connection, shall I proceed?

USER: That's ok for me. Please book my ticket in this airlines.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you.