You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I want to book a flight ticket to attend a marriage at SEA, can you help me with booking?

ASSISTANT: Sure, please share me your planned journey dates?

USER: My journey dates are Apr 17 and Apr 19.

ASSISTANT: Please mention your source airport code?

USER: My source airport code is SFO.

ASSISTANT: Do you want a connecting flight for this journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other requirement?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Cynthia Baker.

ASSISTANT: Thank you for details, sorry there is no any flight available on your given journey data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for visiting us, have a nice day ahead.