You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Can you please help me with booking a flight ticket from OAK to DFW?

ASSISTANT: Sure, can you please share me with your dates of journey?

USER: Journey dates are Dec 22 and 24.

ASSISTANT: May I know your name please?

USER: My name is Jessica King.

ASSISTANT: Do you have any other specifications please?

USER: I would like to return at morning.

ASSISTANT: Are you expecting any other specifications please?

USER: I need a connecting flight.

ASSISTANT: Please wait for a mean while.

USER: Ok.

ASSISTANT: Sorry King, there is no flight found as per your travelling details.

USER: That's ok. Thank you.

ASSISTANT: You are welcome.