You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Christopher Young.

ASSISTANT: Ok.

USER: Could you please help me in booking a flight ticket to ORD to attend a film festival?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I am willing to travel on Oct 4 and return on Oct 6.

ASSISTANT: May I know your source airport code please?

USER: My take off airport code is IAH.

ASSISTANT: Do you have any specifications?

USER: Price should not exceed 200. I need a halt in between my journey.

ASSISTANT: Which class would you like to prefer?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thank you for waiting, we found connecting flight 1000 in Frontier airline with fare of 200. Shall I proceed to book?

USER: Please, proceed.

ASSISTANT: Your flight ticket has been booked in economy class.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.