You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Brenda Lewis here. Can you please book a flight ticket from DFW to HOU?

ASSISTANT: Sure, I am glad to help you. Please let me know your trip dates.

USER: Sure, my trip dates are 07/15 and 07/17.

ASSISTANT: Ok, let me check for the available flights.

USER: Ok, take your time.

ASSISTANT: Direct flight is available with Southwest airlines, are you comfortable with this flight.

USER: Please check for a connecting flight.

ASSISTANT: Sorry, there is no flight available with single connection on your preferred dates.

USER: Ok, no problem. Thank you for helping me.

ASSISTANT: You are welcome and thank you for contacting us.