You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Barbara Evans. Can you please help me to book a flight ticket from BOS to OAK?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My planned journey dates are Sept 24 and Sept 26.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Welcome, have a nice day.