You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Robert Taylor.

ASSISTANT: How can I help you?

USER: Can you please book me a flight ticket from 04/10 to 04/12?

ASSISTANT: May I know your airport codes please?

USER: My source and destination codes are from CLT to PHX.

ASSISTANT: There is a flight with 1 connection in UA airlines.

USER: Ok, please proceed booking.

ASSISTANT: Your ticket is booked with 1003 flight number. Thank you for approaching us.

USER: Thank you.