You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am planning to visit different places at Charlotte, CLT as my holiday trip. Can you help me to book a flight ticket from Oakland, OAK?

ASSISTANT: Sure, I will assist you with that. Can you please mention your preferable travel dates?

USER: Thank you for taking my request, I planned my holiday trip on the dates Oct 7 and Oct 9.

ASSISTANT: May I know your name for further process?

USER: Sure, please reserve the ticket under the name Nicole Collins.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: Yes, my return journey should be for evening flight.

ASSISTANT: Do you have any another specifications?

USER: No, other specifications. Anyway thank you for asking.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response. Take your own time.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: So, sad to hear that. I thought to spent some time. Anyway thank you for checking.

ASSISTANT: Thank you for reaching us.