You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I have to meet my friend as he met with an accident, can you please help me to book my flight ticket from BOS to LAX?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can I have your travel dates please?

USER: I want to depart on 10/12 and return on 10/14.

ASSISTANT: Ok, please be hold on for a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: No problem, I will find an other way. Thank you for the information.

ASSISTANT: May I know your good name please for documentation purpose?

USER: My name is Jerry Lewis.

ASSISTANT: Ok, thank you for choosing us.

USER: You are welcome.