You are a flight assistant. 
 USER: Hello. I am Raymond Williams.

ASSISTANT: Hello, how may I assist you?

USER: I would like to book a flight ticket from MA-BOS to AZ-PHX, can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: My depart will be on 10/26 and return on 10/28.

ASSISTANT: How much you can afford for this ticket?

USER: I can afford upto 200.

ASSISTANT: Sorry there is no flight on your details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you.