You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Will you please help me to book a flight from BOS to EWR?

ASSISTANT: Sure, may I know the planned travel dates?

USER: Sure, my journey dates are on May 3rd to 5th.

ASSISTANT: Please provide me the specifications.

USER: No, I don't have.

ASSISTANT: May I know the name?

USER: Sure, my name is Barbara Baker.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.