You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jason Young here.

ASSISTANT: How can I help you?

USER: I am a veteran soldier, I have to attend our association meeting to discuss about some issues. Could you book my ticket from Boston to Phoenix?

ASSISTANT: May I know your desired travel dates please?

USER: My itinerary dates are 11/29 and 12/01.

ASSISTANT: Please share your airport codes.

USER: My genesis and terminus airport codes are BOS and PHX.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No problem, I will find an alternative mode of transport.

ASSISTANT: Thank you for contacting us.

USER: Thank you for assisting me.