You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Please assist me in booking a flight ticket from PHX to DFW.

ASSISTANT: Sure, may I know on which dates you are willing to travel?

USER: My travel dates are from June 30th to July 2nd.

ASSISTANT: For further proceeding, may I know your good name please?

USER: I am Andrew Campbell.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: would you like to take break in between your journey?

USER: Yes, I need a break in between my journey.

ASSISTANT: Sorry Campbell, there is no flight found on your required travel dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.