You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: Can you please help me in booking my flight ticket from CLT to DEN?

ASSISTANT: Sure, please share your planned travelling dates to proceed further.

USER: My travelling dates June 14 and 16.

ASSISTANT: Do you need a break in between your journey?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: Lisa Collins here.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: I need my return ticket at afternoon time.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for approaching us.