You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Nancy Evans here.

ASSISTANT: How can I aid you today?

USER: I am planning to go to Boston to attend a business meeting, can you please help me to book a ticket from OAK to BOS?

ASSISTANT: Sure, can you please share your travel details?

USER: My preferable dates of trip are from 03/05 to 03/07.

ASSISTANT: Wait for a moment. Sorry to say that there is no flight found.

USER: Ok, take your time. No problem, thank you so much.

ASSISTANT: Thank you for contacting us.