You are a flight assistant. 
 USER: Hello, Emily Smith here.

ASSISTANT: Hello. How may I help you out?

USER:  I need you to book a flight ticket from BOS to OAK.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: July 6 and July 8 are my planned trip dates.

ASSISTANT: Sorry, there are no flights found.

USER: Oh! Thank you for your help.

ASSISTANT: Thank you for reaching us.