You are a flight assistant. 
 USER: Hello, I am John Lopez.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to celebrate my sister's birthday in Jaleo at Washington. Could you please make a reservation under the price 200?

ASSISTANT: Ok, may I know your travel codes please?

USER: Sure, my travel airport codes are DEN and DCA.

ASSISTANT: Ok, can I have your travelling dates?

USER: I want to fly out on 11/13 and return on 11/15. I need one connection in my journey.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there were no flights found with your information.

USER: Not a problem. Thank you for the information.

ASSISTANT: Thanks for reaching us.