You are a flight assistant. 
 USER: Hello, I am Justin Campbell.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me booking a flight ticket from OAK to BOS?

ASSISTANT: Sure, I will help you. On which dates you have planned to travel?

USER: I will start on 03/19 and return on 03/21.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.