You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joseph Brown.

ASSISTANT: How may I assist you today?

USER: I want to book a direct flight ticket to attend an emergency case. Can you help me?

ASSISTANT: Sure, please provide me your travelling dates.

USER: 03/14 and 03/16 are my travelling dates.

ASSISTANT: May I know your travelling airport codes?

USER: IAD and PHL are my airport codes.

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: I found a flight with UA airline and price of the ticket is 200 with 1 connection, shall I proceed?

USER: You can reserve it.

ASSISTANT: Your ticket has been booked with flight number 1023.

USER: Thank you for your help.

ASSISTANT: My pleasure.