You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: As I am a singer, I want to participate in Music festival at Houston, HOU. Can you please help me for booking?

ASSISTANT: Sure, may I know your name please?

USER: Sure, I am Virginia Scott.

ASSISTANT: May I know your source airport code please?

USER: My source airport code is DCA.

ASSISTANT: May I know your travelling dates please?

USER: My trip dates are Jan 26 to Jan 28.

ASSISTANT: May I know your preferable time for journey?

USER: I am comfortable with any time.

ASSISTANT: Do you have any other specifications please?

USER: No.

ASSISTANT: Sorry Scott, there is no flight found as per your travelling details.

USER: Ok, no issues. Thank you.

ASSISTANT: You are welcome.