You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you please help me to book a flight ticket from BOS to DEN?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Do you prefer a connecting flight or a direct flight?

USER: I prefer a connecting flight.

ASSISTANT: Ok, help me with your class preference.

USER: I am fine with any class.

ASSISTANT: Ok, please specify your name.

USER: I am Andrew Harris.

ASSISTANT: Is there any other essentials to meet?

USER: I prefer to travel in major airlines.

ASSISTANT: Let me know your planned dates.

USER: My travel dates are in Apr from 15th to 17th.

ASSISTANT: As per your information, no flights were found based on your information.

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

ASSISTANT: Thank you for choosing us.