You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I need a ticket from Chicago, IL-ORD to Houston, TX-IAH.

ASSISTANT: Sure, can you please provide your travelling dates to proceed further?

USER: My departure date is 02/20 and return is by 02/22.

ASSISTANT: Meanwhile, please provide your name.

USER: I am Nancy Mitchell.

ASSISTANT: Delta airlines is available on this route with a ticket fare of 100 and 1 connection limit, shall I proceed to book your ticket?

USER: Please provide direct flight.

ASSISTANT: Nancy Mitchell, there is no direct flight available on this route.

USER: Thanks.

ASSISTANT: Thank you for contacting us.