You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me to search a flight with 0 connection limit?

ASSISTANT: Sure, may I know your journey dates please?

USER: The journey dates are 10/15 to 10/17.

ASSISTANT: Can you please provide me your airport codes?

USER: The airport codes are from DC-IAD to TX-HOU.

ASSISTANT: Please provide me your name.

USER: My name is Jessica Brown.

ASSISTANT: There are no flights available with your preferences.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for choosing us.