You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be there for you?

USER: I am Helen Lewis. I would like to go for a shopping at Pier 39, San Francisco. Can you help me in my booking?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: May I know when are you planning to travel?

USER: I will start my journey on 01/19. I will return on 01/21.

ASSISTANT: Do you need a flag stop?

USER: I need a layover in my journey.

ASSISTANT: Kindly mention your airport codes.

USER: My destination is CA - SFO. My source airport code is Orlando, FL - MCO.

ASSISTANT: Thank you for sharing your details.

USER: Ok.

ASSISTANT: There are no flights available at this moment.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.