You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to book a flight ticket from IAH to OAK?

ASSISTANT: May I know your travel dates?

USER: My travel dates are 21 to 23 of Sep.

ASSISTANT: Do you have any connecting flight preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Christopher Wright.

ASSISTANT: Delta Airlines is providing connecting flight with the ticket fare of 100 and depart time is 11:00 hours, arrival time is 2:00 hours. Shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1014.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.