You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Timothy Barker.

ASSISTANT: How may I assist you today?

USER: I am planning to book a ticket from BOS to PHX. Can you please help me out to book a ticket for me?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: I am planning to travel on Mar 31 and return back on Apr 02.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: That's fine, thank you for your service.

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