You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kimberly Williams here.

ASSISTANT: How can I help you?

USER: Can you please help me out in booking the ticket from BOS to OAK? As I have to join my friends in trekking at Oakland hills.

ASSISTANT: Sure, I will help you with that. Could you please share your travelling dates?

USER: Sure, my travel dates are 11/07 and 11/09.

ASSISTANT: Ok, please be on hold, I will get back to you with flight details.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry to tell you, there are no flights available as per your travelling dates.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for choosing us, have a great day.