You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book flight ticket from BOS to OAK?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are May 15 and May 17.

ASSISTANT: Do you have any specifications?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name?

USER: Myself Thomas Anderson.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: It's ok, thank you.

ASSISTANT: Thank you.