You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Robert Allen here.

ASSISTANT: How can I assist you?

USER: I want to book a connecting flight from BOS to PHX, can you please help me in booking a flight ticket?

ASSISTANT: Ok, can you please mention your desired dates for the following journey?

USER: Sure, my travelling dates are from 03/24 to 03/26.

ASSISTANT: Ok, please allow me to check with availability on your requirement.

USER: Ok, take your time.

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

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for approaching our services.