You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I need to travel Los Angeles, can you please reserve flight ticket from OAK and LAX?

ASSISTANT: Sure, let me know your travel dates please?

USER: My travelling dates are June,26 and June,28.

ASSISTANT: May I know your connection limit?

USER: I need single connection for my travel.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: My return time should be in the evening.

ASSISTANT: Ok, is there any class preference?

USER: No, I am ok with any class which is available.

ASSISTANT: Do you have any airline preference?

USER: No, I don't have any airline preference.

ASSISTANT: For further proceed to booking, may I know your good name please?

USER: Myself Sharon Johnson.

ASSISTANT: Sorry to inform you that there are no flight services available on your given dates.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey.

ASSISTANT: Thanks for contacting us.

USER: Thank you for the information.