You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello.

USER: I am Rebecca Evans.

ASSISTANT: Rebecca Evans, how may I assist you today?

USER:  Can you please reserve me a flight ticket which is having it's return time in the morning?

ASSISTANT: Sure, I will help you. Please help me with your planned travel dates.

USER: My travelling dates are 03/21 and 03/23.

ASSISTANT: Please help me with your depart and arrival airport codes.

USER: My airport codes are LAS and PHL.

ASSISTANT: Do yo need a direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Please let me know if you have any other preferences in your journey?

USER: I don't have any other preferences.

ASSISTANT: Rebecca Evans, I am really sorry to inform you that there are no active flights available for your journey.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us. Have a great time.