You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Laura Thomas. I am planning to go for my sister's baby shower program at Chicago, ORD. Can you please book a direct flight for me?

ASSISTANT: Sure, please share me your travelling dates?

USER: Journey dates are 09/02 to 09/04.

ASSISTANT: Kindly assign me your source code?

USER: Source code is Boston, BOS.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights with your specifications.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.