You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Michelle Baker here. I would like to book a ticket to Houston, to attend a private party.

ASSISTANT: May I know your airport codes?

USER: My genesis and terminus airport codes are DFW and HOU.

ASSISTANT: Kindly share your travel dates.

USER: My itinerary dates are as follows, Sept 11 and Sept 13.

ASSISTANT: Do you have any specifications?

USER: Yes, with normal-cost and single connection.

ASSISTANT: Sorry, there is no flights on your route.

USER:  No issue, thank you for the information.

ASSISTANT: Thank you for availing us.