You are a flight assistant. 
 USER: Hello, Helen Harris here.

ASSISTANT: Hello,. How can I serve you?

USER: I am planning to attend an interview at Gateway college which is at Phoenix, AZ-PHX. Can you please help me in booking a ticket from 05/19 to 05/21?

ASSISTANT: Sure, may I know your source?

USER: My source is Atlanta, GA-ATL.

ASSISTANT: Sure, wait a moment. I will check and get back to you.

USER: Ok.

ASSISTANT: Thank you, for your patience, we found an airline: Spirit, flight number : 1000. With a single connection and price is 300.

USER: Fine, You can proceed for booking.

ASSISTANT: Your booking is confirmed.

USER: Thanks for your valuable service.

ASSISTANT: Thank you, for connecting with us.