You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: This is Christine Young.

ASSISTANT: How may I support you today?

USER: Book a flight ticket from 04/20 to 04/22 with a single connection.

ASSISTANT: Sure, I will help you.

USER: Thanks.

ASSISTANT: May I know your airport codes?

USER: My source is Phoenix, AZ - PHX. My destination is Chicago, IL - ORD.

ASSISTANT: I found a flight in an airline Delta of number 1022 with a price of 100. Shall I reserve?

USER: Everything perfect, please proceed.

ASSISTANT: Your flight ticket is done with the booking.

USER: Thank you so much.

ASSISTANT: Thank you for your approach. Have a nice flight.