You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I want to fly from DFW to HOU. Can you book a ticket from that route?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: Sure, my planned travel dates are 05/16 and 05/18.

ASSISTANT: Ok, could I have your name please?

USER: Sure, Jennifer Roberts here.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I want a flight with single connection.

ASSISTANT: Ok, do you have any other specifications?

USER: No more, thank you.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No issues, thank you for the information.

ASSISTANT: You are welcome, have a great day.