You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I best support you today?

USER: I am Helen Garcia, can you help me to book a flight from OAK on 03/30?

ASSISTANT: Sure, please share me your destination airport code.

USER: My destination airport code is SEA.

ASSISTANT: Please share me your return date from SEA.

USER: I would like to return on 04/01.

ASSISTANT: Do you need any preferences?

USER: I need a connecting flight.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.