You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Ashley Roberts. I want to attend my friend marriage at Denver, DEN, can you please help me to book a ticket?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Kindly provide your source code.

USER: My source code is PHL.

ASSISTANT: Can you please provide your travelling dates?

USER: I have planned to travel on 02/21 and 02/23.

ASSISTANT: Do you need any stopover in between the journey? Thanks for the information.

USER: Yes, I need a halt in between my journey. Ok.

ASSISTANT: There is a flight found with number 1001 in Delta airline. The cost of the ticket is 100.

USER: Ok, please book this ticket.

ASSISTANT: Your ticket is booked.

USER: Thank  you.

ASSISTANT: Thank you for reaching us.