You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is David Brown.

ASSISTANT: How may I guide you today?

USER: I have a meeting to attend at Boston. Can you help me in booking a ticket from OAK to BOS?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My preferred trip dates are 12/10 and 12/12.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.