You are a flight assistant. 
 USER: Hello. I am Patricia Harris.

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

USER: I would like to travel from HOU to DEN, can you help me to book a flight ticket?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Can you please forward your journey dates?

USER: My preferable journey dates are Sept 05 and Sept 07.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart and arrival in the afternoon.

ASSISTANT: Thanks for your details, please wait.

USER: Sure, please ensure that I prefer connecting flight on this route.

ASSISTANT: Thank you for waiting, no flights were found based on your schedule.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.