You are a flight assistant. 
 USER: Hello. I am Jessica Nelson.

ASSISTANT: Hello, how could I aid you?

USER: I am planning to visit Houston, can you please book me a ticket from DEN to HOU?

ASSISTANT: Can you please share me your planned trip dates?

USER: I am planning my journey on the dates of Dec 23 and Dec 25.

ASSISTANT: At which time you would like to depart and arrive?

USER: I would like to depart in the afternoon and would like to arrive at afternoon time.

ASSISTANT: Do you want to fly with economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Let me know your connection limit please.

USER: I prefer connecting flight on this route.

ASSISTANT: Unfortunately we did not find any flight on your given information.

USER: Ok, not an issue. I will find any alternate for this trip.

ASSISTANT: Thank you for opting us.

USER: Thank you for providing information.