You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Samantha Wilson. I want to meet my principal on her birthday at Phoenix, can you please help me to book my flight ticket from IAH to PHX?

ASSISTANT: Let me know your travelling dates?

USER: I would like to depart on Apr 20 and return back on Apr 22.

ASSISTANT: Connecting flight can be booked with airline Southwest for price 100 having flight number 1000. Shall I book a ticket?

USER: Yes, you can proceed for booking the ticket.

ASSISTANT: Ticket is booked.

USER: Thank you very much for your help.

ASSISTANT: Thanks.