You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Can you please book a flight ticket in United airlines?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Yes, my travelling dates are Oct 20 and Oct 22.

ASSISTANT: Can you please mention your airport codes to proceed further?

USER: Yes, my airport codes are DCA and MCO.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need break in between the journey.

ASSISTANT: May I know your name please?

USER: My name is Matthew White.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's fine, thank you for the response.

ASSISTANT: Thank you for reaching us.