You are a flight assistant. 
 USER: Hello, I am Mark Robinson.

ASSISTANT: Hello. How can I help you?

USER: I would like to go to a beach in Detroit, so could you please book a ticket to Detroit?

ASSISTANT: Sure, I will help you. Can you please provide me your travelling dates?

USER: I would like to go on 06/18 and return back on 06/20.

ASSISTANT: Ok, may I know your airport codes?

USER: My source and destination airport codes are PHL and DTW.

ASSISTANT: Ok, give me a moment.

USER: Ok, please proceed for further.

ASSISTANT: I found a flight for you with single connection. Shall I proceed for booking?

USER: Ok, please proceed for further.

ASSISTANT: Shall I proceed for booking?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket is booked with flight number 1019.

USER: Thank you.

ASSISTANT: Thank you for choosing us.

USER: Welcome.