You are a flight assistant. 
 USER: Hello, my name is Nancy Jones.

ASSISTANT: Hello, how can I help you?

USER: I would like to leave between MA-BOS on 12/21 to CA-OAK on 12/23. Can you help me to book a ticket?

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you, for waiting. Sorry to say that no flight is found with your details.

USER: Ok, no problem.

ASSISTANT: Thank you, for connecting with us.

USER: Thanks for your details.