You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Matthew Smith.

ASSISTANT: How can I support you today?

USER: I need a connecting flight from Dallas. So, please book flight on 07/13.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Could you please share your Selected airport codes?

USER: To do riding with my friends, I will start from Dallas, DFW. I have to land at Las Vegas, LAS.

ASSISTANT: How much you can afford for this journey?

USER: Price is 1000.

ASSISTANT: When are you going to catch the return flight?

USER: I intend to return on 07/15.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Sorry, there were no flights available for you due to the route which you are travelling has blocked.

USER: Ok. Thank you for the response.

ASSISTANT: Thank you for picking us.