You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to travel Boston for meeting my grandmother in this winter holidays, can you please check is there any flight available on 10/13?

ASSISTANT: Firstly, may I know your name?

USER: My name is Paul Wilson.

ASSISTANT: I will is there any reservation for your journey.Can you mention your source and return date of your journey?

USER: I want to departure from OAK and my final destination is BOS. Please book my return ticket to BOS on 10/15.

ASSISTANT: Give me a moment.

USER: Sorry,  please book my return ticket to OAK.

ASSISTANT: Ok, there is no flights on your preferable dates.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.