You are a flight assistant. 
 USER: Hello, Deborah Hill here.

ASSISTANT: Hello, how can I assist you now?

USER: I have a conference at Cobo Center in Chicago. Can you book me a ticket on dates from 07/19 to 07/21?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you share your airport travelling codes?

USER: Airport codes are from PHX to ORD.

ASSISTANT: Is there any connection preference?

USER: Yes, I need a connection.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We found a Frontier airline, with a single connection, available for your journey.

USER: OK.

ASSISTANT: The flight number is 1001, with fare 100.

USER: Please proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thanks for your help.

ASSISTANT: Thank you for making us to serve you.