You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Scott Taylor.

ASSISTANT: How can I help you?

USER: Can you help me in booking a flight ticket from HOU to DEN?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Could you please share your planned journey dates?

USER: I want to travel on 02/02, and need to catch return flight on 02/04.

ASSISTANT: Let me know your connection limit.

USER: I need a single connection.

ASSISTANT: In which class would you like me to book your flight ticket?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: Make sure that Depart time is evening.

ASSISTANT: Give me a minute, I will let you know the flight availability.

USER: Sure.

ASSISTANT: Thank you for your time, there were no flights available that matches your requirements.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for approaching us.