You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Gary King here, I want to reserve my ticket from OAK to CLT, can you please help me out?

ASSISTANT: Sure, please share your trip dates.

USER: Sure, my planned dates of journey are from Jul, 10 to Jul, 12.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a depart time at evening and return time at morning.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, no flights are available from CLT in the morning.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for choosing us.