You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Green.

ASSISTANT: How may I guide you?

USER: I have to go to Charlotte next week. Can you please book a flight ticket from BOS to CLT?

ASSISTANT: Green, I am willing to help you with this. When you are planning to travel?

USER: Thank you for your positive response, I want to take off on 03/07 and please confirm my return ticket also on 03/09.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Green sorry for inconvenience, no flights are available with your criteria.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you Green for contacting us.