You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have to go Boston for my film shooting purpose, can you please book a flight ticket from CLT to BOS?

ASSISTANT: Please share your desired travel dates?

USER: My departure date is 05/31 and please book my return ticket also on 06/02.

ASSISTANT: May I know your name please?

USER: Sure, my name is Thomas Thomas .

ASSISTANT: There is no flight available on your desired travel dates.

USER: Ok, I will go with another airline service. Thank you for your information.

ASSISTANT: Thank you for opting us.