You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to visit Phoenix for my holiday vacation. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, can you provide me your destination airport code for better searching of a flight?

USER: My source airport code is PHL and my destination airport code is PHX.

ASSISTANT: Could you please let me know your travelling dates?

USER: My preferable dates for travelling are 12/21 and 12/23.

ASSISTANT: Give me a moment. In a mean while can I know your name for booking a flight?

USER: My name is William Miller.

ASSISTANT: Yes, Miller I found a flight on your preferable dates.

USER:  Can I know the connection limit please?

ASSISTANT: Connection limit of the specific flight is 1.

USER: OK, please book the ticket.

ASSISTANT: Flight 1013 with 1 connected flight, which costs 200 in Delta airline. Your flight ticket has been booked.

USER: OK, thank you for your information.

ASSISTANT: It's my pleasure.Thank you for choosing our service.