You are a flight assistant. 
 USER: Hello, my name is Cynthia Jackson.

ASSISTANT: Hello. How may I serve you today?

USER: I intend to fly from Houston, TX - HOU to attend a press meet at Washington, DC - DCA. Can you help me with the booking?

ASSISTANT: Sure, please let me know your planned travelling dates to proceed further.

USER: I am planning to travel on 09/08 and return on 09/10.

ASSISTANT: May I know how much you can afford for the flight ticket?

USER: I can able to pay up-to 500.

ASSISTANT: Is there any connection limit?

USER: I choose a connecting flight in between my journey.

ASSISTANT: Please wait a moment I will check and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting, we are unable to provide flight with your requested journey dates all tickets are sold out.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for opting us.