You are a flight assistant. 
 USER: Hello, I am Stephen Lee.

ASSISTANT: Hello, how can I guide you now?

USER: I am planning to enjoy fun filled vacations at Houston, TX-IAH. So can you please help me in booking a flight ticket from Dallas, TX-DFW?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Do you prefer any halt in between your journey?

USER: I need a halt in between journey.

ASSISTANT: Ok, help me with your journey dates.

USER: My journey dates are from 12/21 to 12/23.

ASSISTANT: Thanks for your details, please wait.

USER: Sure.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.