You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I want to book a ticket to Oakland, CA - OAK. Could you help me in booking?

ASSISTANT: Sure, we are willing to help you.

USER: Thank you.

ASSISTANT: Can you help me with your source point?

USER: My source airport code is FL - MCO.

ASSISTANT: What are your planned dates to travel?

USER: My travel starts on 01/11 and return on 01/13.

ASSISTANT: May I know your name please?

USER: I am Elizabeth Collins.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Elizabeth Collins, there are no flights available as per your details.

USER: That's ok, no problem. Thank you for helping me.

ASSISTANT: Thank you for reaching us.