You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Carol Campbell.

ASSISTANT: Carol, how can I assist you?

USER: I would like to meet my grandfather, can you please book the flight ticket from CLT to BOS?

ASSISTANT: May I know your itinerary dates?

USER: Sure, I want to depart on 08/11 and return on 08/13.

ASSISTANT: Sorry, no flight is available.

USER: Sad to hear that, thank you very much for checking.

ASSISTANT: Thank you for contacting us.