You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Myself Christine Scott. I am willing to travel this month to attend my friend marriage at Dallas. Can you please help me in reserving the ticket from OAk to DFW?

ASSISTANT: Sure, may I know your travelling dates?

USER: I am planning to travel on June 2nd and again I will retrieve on June 4.

ASSISTANT: Do you need a connecting fight?

USER: Yes, I am comfort with single connection.

ASSISTANT: Ok, wait a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Not a big problem, anyway thank you very much for your information.

ASSISTANT: Thank you for choosing us.

USER: You are welcome.