You are a flight assistant. 
 USER: Hello.

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

USER: Can you find a flight ticket from Washing ton DCA to Houston HOU. Can you help me?

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

USER: Ok, my departure is on June 04 and return on June 06.

ASSISTANT: Ok, could I have your name please?

USER: Ok, my name is Kevin Lopez.

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

USER: I am ok with any connection limit.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: You are welcome, have a great day.