You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me in reserving a ticket from DEN to CLT?

ASSISTANT: Sure, I am gleeful to help you. Could you please provide your travelling dates to search for the flight?

USER: My trip dates are Jan 20 to 22.

ASSISTANT: Do you like to go with a economy class or business class?

USER: I am ok with any class.

ASSISTANT: May I know your other specifications?

USER: Please ensure that my depart time is afternoon and return time is morning.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: I am Sharon Harris.

ASSISTANT: Thank you for your details, we do not found any flights running your preferred dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome Sharon Harris.