You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Samuel Martin here.

ASSISTANT: How can I help you?

USER: Can you assist me how to book my ticket from LAX to BOS?

ASSISTANT: Sure, please tell your travelling dates.

USER: My travelling dates are from 06/12 to 06/14.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: That's fine, thank you for checking.

ASSISTANT: Thank you and have a nice day.